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Healthy Keto Apple Crisp Recipe

This is an easy, amazing and delicious recipe for Low Carb “Apple Crisp” not using apples…That’s right. You make this with zucchini squash or yellow squash or a combination of both. When you add “apple pie spices” and lemon juice you can’t tell the difference.

Keto Apple Crisp recipe

Believe it or not, this easy, delicious Keto Apple Crisp is not made from apples. instead, it’s made from yellow or green squash or a combination of both. They both work just as good. 

When we decided that we had to make a Low Carb version of Apple Crisp I was excited. I love apples. I thought low carb meant to just take out the white sugar and the white flour, and you’re all set. I was wrong. It was also important to take out the apples if you want to cut the carb count even more. 

At first I was really disappointed and really negative about using squash instead of apples. But I knew we had to give it a try because people are looking for low carb options and this was what it had to be.

To my amazement… was great, just like our Keto Apple Pie recipe. Let’s see how it’s made….

The Best Substitute for Apples

So the best substitute for apples is yellow or green squash, and the best ones to use are the small squash if possible. The reason why is that the smaller the seeds, the firmer the flesh and as a result the more it will resemble apples.

You can still use larger squash but you may have to cut out the seeds so that your apple crisp is not full of big squash seeds. We have made this apple crisp so many times now and so far, no one has figured out it isn’t apples.

What makes this “Apple Crisp” so Healthy?

How to Make Low Carb Apple Crisp

Zucchini and yellow squash are 2 vegetables that are packed with so many vitamins and are both low in carbs, 2.7 carbs per cup of cooked squash. The squash is loaded with B vitamins, vitamin C, Zinc, Potassium, and fiber, all of which make squash a good healthy choice.  

Real Apples also have a lot of vitamins and fiber too, which make them healthy too, as we have always heard that “An apple a day keeps the doctor away,” but the only thing is they are higher in carbs (14 carbs per cup) than squash.

So if you are on Keto or a strict low carb diet, you may not have enough carbs in a day to include apples. You will have to be the judge of that.  

Apple Crisp, Cobbler or Crumble?

Is Apple crisp the same as apple crumble or cobbler? Crisp and Crumble both originate from England and are so similar, that they have become interchangeable. Here’s a quick breakdown of the 3 desserts. 

Crisps and crumbles both contain fresh fruit with a streusel-like topping that gets baked until the fruit is cooked. The main difference between the 2 is the topping.

In a true apple or blueberry crisp, the crisp topping is usually made with butter, sugar, oats. Whereas a crumble topping will typically be made from butter, sugar, flour. Both though can have nuts and spices added to either of them as a nice addition. 

A fruit cobbler has a thick biscuit topping. It gets its name because the dollops of biscuit dough or batter are dropped on top of the fruit mixture, and they puff up looking like cobbled roads. 

What Ingredients are in Keto Apple Crisp?

Apple Crisp recipe ingredients

Yellow or Green Squash – I prefer using small green zucchini’s. I know it sounds odd, but zucchini can have the same taste of apples by adding some lemon juice, the right spices, and some low carb sweetener. This way you get the taste you love without adding all the carbs.  

Lemon Juice – I find this to be absolutely a key ingredient to making this mock apple crisp. Apples, unlike zucchini, are rather acidic so adding some fresh lemon juice gives you the added acidity that you need, from leaving out the apples. 

Butter – I don’t just melt the butter, but I find that browning it first gives it a really nice flavor. 

Golden Monk Fruit – This is a new low carb sweetener I started using for this recipe. It’s a raw cane sugar replacement. Used for the filling, it’s mixed with the browned butter. But I also used it for the crisp topping as well. 

Cinnamon & Nutmeg – Essential seasonings to making this zucchini apple crisp right on point. Anytime you add these classic seasonings to a fall dessert it’s perfect. 

Xanthan Gum – This is used to help thicken up the filling. The general rule of thumb with xanthan gum is less is more. You only need a small amount to thicken the filling. 

Pecans – This is for the topping since I don’t add oats like what you would find in a typical crisp topping.  The chopped nuts help to add some bulk to the flour and they crisp up as the oats would. 

Almond Flour – So typically you would add flour to a crumble topping, but I decided to add it to my crisp topping. It’s a good binder and adds some volume to the crisp.  

What do I Use for the Apple Crisp Topping?

keto Apple Crisp top ingredients

We use butter, pecans, golden monk fruit, almond flour, and cinnamon.

Butter is an essential ingredient for any crisp topping, whether it’s a low carb or not. It’s the foundation ingredient in which you build on after that but make sure that your butter is softened. It makes it much easier to work with. 

Of course, 2 other ingredients that are in most crisp toppings are flour to give it some volume and sugar for the sweetness.

So if it’s going to be low carb, then we replaced the flour with almond flour and the sugar with monk fruit which is a great sugar replacement that converts 1 to 1 as far as sweetness so there’s no guessing game as to the quantity to put into your apple crisp topping.

Unlike regular sugar, monk fruit in most cases does not raise your glycemic index.

The pecans replace the oats and add so much flavor and crunch and are lower in carbs. Oats have about 46 net carbs in 1 cup whereas Pecans have 4 net carbs per cup. Quite a large difference right?! 

How Many Carbs are in Keto Apple Crisp?

In our Apple Crisp, there are 3.6 NET CARBS in ½ cup serving which is fantastic. When you want a dessert you can make up a batch of Low Carb Apple Crisp which only takes a few minutes to prepare and in a short time, you can be eating this delicious dessert.

If ½ cup is not enough, have a whole cup. It would only be 7.2 NET CARBS

How to Make Keto Apple Crisp

Making this keto apple crisp is so easy and only takes about 30 minutes to prep. 

Start by preheating the oven to 350 degrees. Then peel and cut the zucchini into small chunks. I prefer using small zucchinis, but if your zucchini is on the larger side then you should cut the seeds out first. 

chopped zucchini and yellow squash Apple Crisp recipe

In a dutch oven, add the butter and turn heat on medium-high and brown your butter. It only takes a minute or so after the butter has melted to brown. Be careful because you don’t want it to burn, don’t leave it unattended. 

Add the zucchini to the browned butter and stir. Now add the cinnamon, nutmeg, and sweetener. Stir until well combined. 

Slowly pour in the lemon juice, and sprinkle in the xanthan gum. 

Keep on medium heat and cook for about 20 minutes or so. Testing along the way. Add more of the spices or lemon juice if you feel it’s missing something, Stir every couple of minutes, make sure it doesn’t stick to the pan. 

making filling for keto Apple Crisp recipe

While the zucchini is cooking, start making the topping. In a small food processor add your pecans and chop. You don’t want it super fine, just chop until it’s in small pieces.

If you don’t have a food processor then you can chop the nuts using a knife. I personally hate chopping nuts, so I always choose to use a food processor. 

Now in a small bowl combine the softened butter, chopped nuts, golden monk fruit sweetener, almond flour, and cinnamon. Mix all the ingredients together. At this point, I find it so much easier to mix it with my hands, to really make sure it’s combined well. 

Once the zucchini is cooked transfer it to the baking dish. Sprinkle the topping over the zucchini. You should have plenty of topping to cover the squash completely. 

how to make Keto Apple Crisp recipe filling

Put in the oven and bake for about 30 minutes.

Keto Apple Crisp top poured onto the filling

The top should be crispy and the fruit should be bubbling. You can serve hot or cold, and add some Keto vanilla ice cream to it and enjoy!! 

Low Carb Apple Crisp recipe

Variations on Low Carb Apple Crisp

So apples are avoided while on a keto and low carb diet because even just 1 cup of sliced apples can have 12 net carbs. So eating too much of it can certainly knock you out of ketosis.

However, if you are still wanting to use apples then what I did for you is I figured out the nutrition facts when using real apples. 

Instead of using 4 cups of zucchini, replace it with 4 cups of apples. Keep all the other ingredients the same. For ½ cup, it’s 10 net carbs per serving.

If that’s still too high, then what you can do is cut your portion down to a ¼ cup and now it will only be 5 net carbs. That might be a little more doable for you. 

What are some other variations you can make with this a low carb apple crisp? Especially if you’re using real apples, you can also add some other fruit to it.

Blackberries, blueberries, or really any type of berry would work really nicely together. If there are any other fruits that are your favorites, then those could be added as well. 

How to Make the Filling Thicker?

Xanthan gum is going to be your go-to ingredient for so many recipes, including this mock apple crisp.

All you need is about ½ tsp added while you’re cooking the squash, let it simmer and it thickens up in no time. The rule of xanthan gum is: Less is More.  

Other Diets this Recipe is Good for

This easy low carb apple crisp is also gluten-free. The best part is the topping doesn’t contain any gluten. You can buy gluten-free oats, but not everyone would have that in their cabinet or you might not be able to find it at your grocery store.

So replacing the oats with the pecans makes it an easy way to keep it gluten-free and still give you a nice crunch on top. 

What to Serve with Apple Crisp

Keto Apple Crisp recipe with ice cream on top

What’s the first thing that comes to mind when you think of eating apple crisp?? Adding a scoop of vanilla ice cream on top! Yup, that’s what comes to my mind first too. But what’s even better is adding some Keto Ice Cream or even some keto whipped cream.

See eating low carb, doesn’t have to be as bad as what most people think and you don’t have to give up some of your favorite dishes. 

Should Apple Crisp be Refrigerated?

Many people wonder how to store apple crisp after baking it, either this keto version or a normal apple crisp. 

For both Keto crisp and regular apple crisp, you can leave it on the counter the day you cook it, but then it needs to be refrigerated after that. Let it completely cool off while sitting on the counter, then wrap it in plastic wrap and put it in the fridge.

You can also keep it in an airtight container in the fridge as well. It should last for about 3-4 days.

Can I Freeze Sugar-Free Apple Crisp?

You can freeze the low carb apple crisp if you need to, but what we found to be better is freezing it before cooking it.

Do all your prep work and assemble the apple crisp. Then cover it with plastic wrap and then foil. Place in the freezer until you’re ready to cook it. 

To cook the apple crisp, then thaw out on the counter, and then bake for 30 minutes at 350 degrees. 

Best Way to Reheat Low Carb Apple Pie

If you want to heat the whole baking dish, then stick it back into the oven to reheat it. Put it on low, around 200 degrees so the topping doesn’t burn. 

But if you want to heat it up in individual bowls, then simply just scoop out the amount you want into a microwave-safe bowl and pop it into the microwave for about 45 seconds. Then top with some Low Carb Vanilla ice cream and it will just slightly melt on top of your crisp. MMMMM…..

Low Carb Apple Crisp

More Keto Desserts Recipes

If you’re in the mood for some other Low Carb Desserts then try our:

They all are Keto-friendly and low carb, and you can eat them guilt-free!!

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Keto Apple Crisp w/ ice cream

Healthy Keto Apple Crisp Recipe

5 Stars 4 Stars 3 Stars 2 Stars 1 Star

4.7 from 17 reviews

  • Author: Stephanie Parlegreco
  • Total Time: 60 minutes
  • Yield: 8 Servings (1/2 cup per serving) 1x
Save Recipe


Easy and delicious Low Carb “Apple Crisp” while not using apples. Zucchini mixed with apple pie spices and fresh lemon juice, and you can’t tell the difference. I dare you to try!




  • 4 cups chopped zucchini
  • ½ cup lemon juice
  • 2 tbsp butter
  • ½ cup golden monk fruit
  • ½ tsp xanthan gum
  • 2 tsp cinnamon
  • 1 tsp nutmeg


  • 1 stick butter
  • 1 cup chopped pecans
  • ½ cup golden monk fruit
  • 1 cup almond flour
  • 1 tsp cinnamon 


  1. Preheat the oven to 350 degrees. 
  2. Peel and cut the zucchini. If the zucchini is on the larger side, then make sure to take out some of the seeds. 
  3. In a dutch oven, turn heat onto medium-high and add the butter. Once butter is melted let it start to brown, but don’t burn it. Now that the butter is browned add the zucchini to the pan. 
  4. Add cinnamon, nutmeg, and sweetener to the zucchini and stir well. Then pour in lemon juice, and add xanthan gum. 
  5. Cook on medium heat for at least 20 minutes. Keep stirring mixture to make sure it doesn’t stick to the bottom of the pan. 
  6. While the squash is cooking, start making the topping. In a food processor, chop the pecans. You can chop them by hand, but I find it way easier to use the food processor. 
  7. In a small bowl combine the softened butter, chopped pecans, almond flour, and cinnamon together. To really mix it in well, you might need to use your hands. 
  8. Once the squash is cooked, transfer it to a baking dish. Sprinkle the topping over the squash, you should have enough to completely cover it. 
  9. Bake in the oven for about 30 minutes or until the top is crispy and the fruit is bubbling. 


3.6 NET CARBS per serving 

Letting your butter brown, is key in making this recipe. Just don’t let it burn. 

Using a small amount of xanthan gum will help to thicken the apple mixture.

Fresh lemon juice will give you the acidity you’re missing from using real apples. 

Keep crisp refrigerated for up to 3-4 days. 

To freeze the crisp it’s better to assemble it and NOT bake it. To thaw it, leave on the counter, then bake at 350 for 30 minutes. 

To reheat, either put in the oven at 200 degrees, or place in the microwave for about 30 seconds. 

Top with Low Carb Vanilla Ice Cream for lots of yummy goodness

If you want to use real apples instead, use 4 cups of sliced apples, and follow all rest of the ingredients as normal. For ½ cup serving it will be 10 NET CARBS per serving

  • Prep Time: 30 minutes
  • Cook Time: 30 minutes
  • Category: Desserts
  • Method: Baking
  • Cuisine: American
Recipe rating 5 Stars 4 Stars 3 Stars 2 Stars 1 Star


Tuesday 3rd of May 2022

I made this on top of a low carb cheesecake using 2 bricks of cream cheese, 1 cup erythritol and 4 eggs. I blend until smooth then put it into a springform pan, baked for 30 mins, then added this topping and baked for another 30mns, IT WAS AMAZING!!!

Leigh Oskwarek

Wednesday 4th of May 2022

How did it come out?


Tuesday 1st of February 2022

The flavours were very good but I encountered some problems. I must have missed where the size of baking dish was listed. I used a 7x11 and the topping covered less than half. Perhaps if I try again I will reduce the amount of filling and use a smaller dish.

Leigh Oskwarek

Friday 4th of February 2022

Hi Jenny,

I'm sorry about the confusion with the size of the pan. We used a 9 inch round metal pan. I wouldn't reduce the size of the filling. Just use a smaller pan with the portions that are in the recipe, or else double the recipe and use a larger pan. It is one of our most popular and looked at recipes so I'm sure you will enjoy it. We served it to a lot of our friends and family before posting it and no one knew it wasn't apples.


Sunday 9th of January 2022

Are you kidding me??? When my children were young, apple crisp was an all time favorite of our family! They have all grown up now and I am on Keto and have missed terribly one of my favorite desserts…until now☺️. This zucchini/apple crisp is authentically delicious in every respect, texture, flavor and aroma! I would never, ever know this is made with zucchini. The thing that totally makes the difference in authenticity is the 1/2 cup of lemon juice…a total game changer from other recipes. Thank you 😋

Leigh Oskwarek

Monday 10th of January 2022

Hi Carol, The first time we made this recipe we were so excited that it actually tasted like authentic apple crisp. We served it to our husbands and some friends and to our surprise they all loved it and did not know that they were eating squash, they thought it was apples!!! So it was a hit and we put it to pictures and print. Thank you for letting us know how much you love makes it all worthwhile!! Please try some of our other recipes and let us know which ones that you like. Thanks.


Wednesday 29th of September 2021

Added one packet of sugar free hot apple cider to the lemon juice. It was sooooo good!

Leigh Oskwarek

Wednesday 6th of October 2021

Lisa, I am so glad that you loved the recipe


Saturday 4th of September 2021

Sorry - never mind - I was looking at scale instead of serving