Keto Grain-Free Apple Crumble Pie
A completely grain-free take on classic apple crumble pie, combining a buttery almond flour crust with spiced apple filling and a crunchy coconut-almond topping. This dessert delivers the comfort of traditional pie without wheat or gluten, making it ideal for those avoiding grains or following paleo diets. The filling balances tart Granny Smith apples with sweet Honeycrisp varieties, brightened by cinnamon and thickened with coconut milk and arrowroot starch for a silky texture. The pre-baked crumble topping adds essential crunch that contrasts beautifully with the soft filling. Perfect for dinner parties, holiday tables, or anyone seeking indulgent dessert that accommodates dietary restrictions. This version distinguishes itself through a pre-baked crumble layer, preventing sogginess, and the strategic use of gelatin powder for structural integrity in the dairy-free crust.
Ingredients
- 3 cup almond flour
- 5 tablespoon coconut flour
- ⅝ teaspoon sea salt
- 1 teaspoon gelatin powder
- 2 tablespoon coconut sugar
- 1 egg
- 1 cup unsalted butter
- 3 Granny Smith apple, whole
- 4 Honeycrisp apple, wholeGala apple1:1tags:sweet
note:slightly less crisp initially, similar sweetness
- ¾ cup coconut sugar
- 8 tablespoon unsalted butter
- ½ teaspoon ground cinnamon
- ½ cup light coconut milk
- 1 tablespoon arrowroot starch
Instructions
- 1
Preheat oven to 375 degrees F with rack in middle position.
- 2
For crust, combine almond flour, coconut flour, sea salt, gelatin powder and coconut sugar in food processor and pulse until blended.
- 3
Add egg and butter, pulse quickly 8-10 times, then run processor until dough forms.
- 4
Flatten dough between plastic wrap into round circle and refrigerate 25-30 minutes.
- 5
Remove plastic wrap, transfer dough to buttered 9-inch pie plate, press evenly along bottom and sides, shape edges, and refrigerate 20 minutes.
- 6
Blind bake crust with pie weights for 12 minutes, remove weights and paper, then bake 8-10 minutes until edges lightly brown.
- 7
While crust chills, melt butter in large pot over medium heat.
- 8
Add apples, coconut sugar, cinnamon and sea salt, cook 5 minutes stirring occasionally until apples release juices.
- 9
Pour coconut milk over apples and continue cooking with continuous stirring until apples soften and liquid thickens, about 5 minutes.
- 10
For topping, pulse almond flour, coconut flour, arrowroot starch, gelatin powder and coconut sugar in food processor 2-3 times.
- 11
Add butter and pulse 8-10 times quickly, then run until crumbly dough forms.
- 12
Spread crumble mixture on wax-lined baking sheet in even layer and bake 10 minutes.
- 13
Add pie crust to baking sheet, top with cooked apple filling, then scatter hot crumbs over top.
- 14
Bake 10-12 minutes until topping turns golden brown, cool 20-30 minutes, then serve.
Tips
Pre-bake the crumble topping separately on a baking sheet for 10 minutes before adding to pie. This ensures a crispy, crunchy texture that won't absorb moisture from the filling, preventing the soggy topping problem common in fruit crisps.
Chill dough components before combining. Cold butter and even cold eggs integrate better into the flour mixture, creating a more tender, flaky crust structure in grain-free batters that lack gluten's binding strength.
Use a mix of apple varieties intentionally. Granny Smiths provide tartness and structural integrity during cooking, while Honeycrisps add sweetness and soften quickly, creating balanced flavor and texture throughout the filling.
Good to Know
Cover cooled pie and refrigerate up to 3 days. Store at room temperature covered for up to 8 hours, though texture deteriorates faster in warm environments due to coconut milk filling.
Prepare dough and freeze wrapped up to 2 weeks. Thaw in refrigerator before using. Crumble topping can be made and frozen up to 1 week; bake from frozen, adding 2-3 minutes to bake time.
Serve warm or at room temperature with coconut whipped cream, dairy-free vanilla ice cream, or on its own. Pairs well with herbal tea or coffee.
Common Mistakes
Skip blind-baking the crust to avoid a soggy bottom layer incompletely cooked through.
Over-pulse the dough to avoid tough, dense texture; brief pulses create desired flaky structure in grain-free batters.
Skip the pre-baked crumble step to avoid soggy topping; baking separately preserves the critical crunch element.
Use warm butter in dough to avoid poor texture; cold butter creates superior flakiness in almond flour crusts.
Substitutions
Dairy-Free Swaps
Gluten-Free Swaps
General Alternatives
note:slightly less crisp initially, similar sweetness
FAQ
Can I make this pie ahead and freeze it?
Yes. Assemble completely, cool fully, wrap tightly and freeze up to 3 weeks. Thaw in refrigerator overnight before serving. You can also freeze components separately: dough up to 2 weeks, filling up to 1 week. Avoid freezing the baked crumble topping as it loses crispness; add it fresh before serving.
What if I don't have both apple varieties?
Use seven apples of a single type, though flavor complexity decreases. Granny Smiths alone create tart, firm filling; Honeycrisps yield sweeter, softer results. For balanced filling, substitute with other tart varieties like Pippins or Pink Ladies, adjusting sweetness by reducing or increasing coconut sugar slightly.
Why is my crust falling apart?
Likely causes: insufficient chilling, not enough egg or butter, or over-processing. Ensure dough reaches proper consistency before refrigerating. Grain-free doughs lack gluten, so hydration balance is critical. If still crumbly, add 1 teaspoon coconut milk and pulse again. Always refrigerate between steps to maintain structure.