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Keto Apple Crisp Recipe

Dom Lorenzo
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If you're craving the cozy, sweet warmth of an apple crisp but want to stick to your keto goals, this Keto Apple Crisp recipe has you covered! We've swapped traditional apples for a secret ingredient, giving you all the flavor and texture of the classic dessert without sugar and carbs!

Keto apple crisp in a baking dish.
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Preparation and cooking overview

Making a low-carb apple crisp at home is a breeze. The secret ingredient? Chayote squash! It’s a perfect substitute for apples, offering a similar texture and flavor when cooked to perfection.

Simply slice the squash, toss it with warm spices and a keto-friendly sweetener, and top it with a buttery, crumbly pecan mixture. Bake for 45 minutes, and you’ll have a golden, bubbling, sugar-free dessert that’s absolutely irresistible!

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Chef's note

Don’t be afraid to get creative with your keto apple crisp! Chayote squash is a fantastic low-carb swap for apples, but if you’re craving a slightly tangier flavor, try mixing in a few slices of zucchini—it works surprisingly well.

  • Prep Time: 15 minutes
  • Cooking Time: 30 minutes
  • Total Time: 45 Minutes
  • Difficulty Level: Easy
  • Recipe Makes 6 Servings

Ingredients for this Keto Apple Crisp Recipe

Ready to whip up the best keto Christmas dessert? Take notes of this shopping list and gather these ingredients:

  • 1.3 pounds chayote squash, peeled, cored, and sliced thin
  • 1 tablespoon lemon juice, freshly squeezed
  • 1 teaspoon ground cinnamon
  • ¼ teaspoon ground nutmeg
  • ¼ cup erythritol
  • 1 cup almond flour, blanched preferred
  • ¼ cup coconut flour
  • ½ cup chopped pecans, optional
  • ¾ cup unsalted butter, cold and cubed
  • 1 teaspoon vanilla extract
  • ½ teaspoon salt

Additional Ingredients

  • Xanthan gum: Add ¼ teaspoon of xanthan gum into the chayote mix to thicken the filling.
  • Ground ginger: Add ¼ teaspoon of ginger powder to the spice mix for a touch of warm, peppery heat.

Ingredient Substitutions

  • Erythritol: Use allulose or monk fruit sweetener if you prefer a different keto-friendly sweetener. They dissolve well and provide a similar sweetness.
  • Butter: Replace butter with coconut oil or ghee for a dairy-free version of this apple crisp.

Cooking Tools Required

  • Mixing bowls
  • Whisk
  • Fork
  • Medium baking dish (8x8 inches)
  • Peeler
  • Knife
  • Chopping board

Tools Substitute Options

  • Baking dish: If you don’t have a baking dish, use any oven-safe dish, like a cast-iron skillet or a casserole dish.

How to Make Keto Apple Crisp: Step-by-Step Guide

Cooking Methods

  • Baking

Preparation Steps

  1. Gather and measure all the ingredients.
  2. Peel the chayote squash, core it, and slice it into thin, even slices.
  3. Finely chop the pecans into small pieces.

Cooking Instructions

Prepare the topping

  1. Set your oven to 350°F (175°C).
  2. In a mixing bowl, mix almond flour, coconut flour, chopped pecans, and salt until combined.
  3. Add the cold, cubed butter to the dry ingredients and mix with a fork until the mixture resembles coarse crumbs.
  4. Finally, stir in the vanilla extract and put the bowl aside.

Assemble the crisp

  1. In another mixing bowl, toss the chayote slices with lemon juice, cinnamon, nutmeg, and erythritol.
  2. Spread the prepared chayote squash mixture evenly in the bottom of a baking dish.
  3. Then, sprinkle the crumbly topping mixture over the squash.

Bake

  1. Bake the assembled crisp in the preheated oven at 350°F (175°C) for 25-30 minutes, or until the topping is golden brown and the filling is bubbling.
  2. Let it cool for about 10 minutes before serving.

Chef's pro tip

The most common mistake when making this recipe is not slicing the chayote squash thinly enough. Thick slices can stay firm and may not cook evenly. To prevent this, take your time slicing the squash as thinly as possible, ideally about ⅛-inch thick. If you're unsure, use a mandoline slicer for consistent results.

What to Serve with Keto Apple Crisp?

Looking for the perfect pairings to elevate your keto apple crisp? Here are some options:

  • Whipped cream: Use sugar-free whipped cream for a light, creamy topping that complements the warm spices.
  • Keto ice cream: Ice cream adds a cold, creamy contrast to the crisp’s warm, buttery flavor. For the best options, check out our Pecan ice cream or cottage cheese ice cream.

How to Make It Healthier

  • Use organic ingredients: Opt for organic chayote squash, almond flour, and butter to reduce exposure to pesticides and additives.

Time-Saving Tips

  • Buy pre-chopped pecans to save time and effort during prep.
  • Use a mandoline slicer to slice the chayote squash quickly and evenly.

What Can I Prepare Ahead

  • Prepare and slice the chayote squash ahead of time. Toss it with lemon juice to avoid oxidation and store it in the refrigerator.

Storage and Reheating Instructions

Storage Instructions

  • Refrigerate: Store leftover keto apple crisp in an airtight container in the fridge for up to 4 days to maintain freshness.
  • Freeze: This dish freezes well. Transfer it to a freezer-safe container or tightly wrap the baking dish in foil and plastic wrap. It’s best consumed within 2 months for optimal flavor.

Best Reheating Instructions

  • Oven: Preheat the oven to 350°F (175°C). Cover the dish with foil to prevent over-browning and bake for 15-20 minutes until warmed through.
  • Microwave: Place a portion in a microwave-safe dish, cover loosely, and heat on medium power for 1-2 minutes, checking and stirring halfway through to ensure even reheating.

Recipe Wrap-Up and Conclusion

This Keto Apple Crisp is the ultimate guilt-free treat, delivering all the comforting flavors of a classic dessert without the carbs. It’s easy to make, customizable, and perfect for any occasion, from cozy family dinners to holiday gatherings. Whether you enjoy it fresh from the oven or reheated later, this dish is sure to satisfy your sweet tooth while keeping you on track with your keto goals. Give it a try and savor every bite!

Frequently asked questions

Apples are generally too high in carbs to fit into a strict keto diet. A medium apple has about 25 grams of net carbs, which can take up most of your daily carb allowance.

Yes, many types of squash, like chayote, zucchini, and spaghetti squash, are keto-friendly because they are low in carbs. Chayote, in particular, is an excellent substitute for apples in desserts, as it mimics the texture without the sugar content.

Yes, swap the unsalted butter for a dairy-free alternative like coconut oil or vegan butter. It may slightly change the flavor but will still be delicious.

If the topping isn’t crisping up, broil it for 1-2 minutes at the end of baking. Keep a close eye on it to prevent burning.

📖 Recipe

Keto apple crisp in a baking dish.

Keto Apple Crisp Recipe

This recipe swaps apples for chayote squash, baked with warm spices and a buttery pecan crumble topping for a low-carb, guilt-free dessert.
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Course: Dessert
Cuisine: American
Prep Time: 15 minutes
Cook Time: 30 minutes
Total Time: 45 minutes
Servings: 6
Calories: 443kcal

Ingredients

  • 1.3 pounds chayote squash peeled, cored, and sliced thin
  • 1 tablespoon lemon juice freshly squeezed
  • 1 teaspoon ground cinnamon
  • ¼ teaspoon ground nutmeg
  • ¼ cup erythritol
  • 1 cup almond flour blanched preferred
  • ¼ cup coconut flour
  • ½ cup chopped pecans optional
  • ¾ cup unsalted butter cold and cubed
  • 1 teaspoon vanilla extract
  • ½ teaspoon salt

Instructions

Preparation Steps

  • Gather and measure all the ingredients.
  • Peel the chayote squash, core it, and slice it into thin, even slices.
  • Finely chop the pecans into small pieces.

Cooking Instructions

    Prepare the topping

    • Set your oven to 350°F (175°C).
    • In a mixing bowl, mix almond flour, coconut flour, chopped pecans, and salt until combined.
    • Add the cold, cubed butter to the dry ingredients and mix with a fork until the mixture resembles coarse crumbs.
    • Finally, stir in the vanilla extract and put the bowl aside.

    Assemble the crisp

    • In another mixing bowl, toss the chayote slices with lemon juice, cinnamon, nutmeg, and erythritol.
    • Spread the prepared chayote squash mixture evenly in the bottom of a baking dish.
    • Then, sprinkle the crumbly topping mixture over the squash.

    Bake

    • Bake the assembled crisp in the preheated oven at 350°F (175°C) for 25-30 minutes, or until the topping is golden brown and the filling is bubbling.
    • Let it cool for about 10 minutes before serving.

    Nutrition

    Nutrition Facts
    Keto Apple Crisp Recipe
    Amount Per Serving
    Calories 443 Calories from Fat 360
    % Daily Value*
    Fat 40g62%
    Saturated Fat 17g106%
    Trans Fat 1g
    Polyunsaturated Fat 3g
    Monounsaturated Fat 10g
    Cholesterol 61mg20%
    Sodium 210mg9%
    Potassium 173mg5%
    Carbohydrates 21g7%
    Fiber 6g25%
    Sugar 10g11%
    Protein 7g14%
    Vitamin A 715IU14%
    Vitamin C 9mg11%
    Calcium 73mg7%
    Iron 1mg6%
    *

    Nutritional values are estimates only and do not include carbs from sugar alcohols.

    # Hashtag with us!Don't forget to mention @castiron_keto or tag #castironketo on Instagram with your creations! We love seeing what you're making.
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