Low-Sugar Pumpkin Apple Crumble with Oat Topping
A satisfying autumn dessert that combines roasted butternut squash and fresh apples with a buttery oat-almond crumble topping, all without refined sugar. This version uses Golden Monkfruit Sweetener to keep carbs minimal while maintaining the warm spice flavors of fall. The filling becomes soft and jammy during cooking, creating contrast with the crispy, crumbly texture on top. The dish balances natural fruit sweetness with cinnamon and pumpkin pie spice for deep, cozy flavors. Perfect for those watching sugar intake or following low-carb diets, it's equally suited for regular eaters seeking a lighter dessert. Serve this warm on cool evenings, at holiday gatherings, or as a comforting weeknight treat. What sets this version apart is the technique of partly grinding oats and grating frozen butter directly into the crumble mixture, which creates an exceptionally tender, melt-in-mouth topping without excess moisture.
Ingredients
- 1 lb butternut squash cubes, peeled and cubedpumpkin puree3/4 cup to 1 lb squashingredientdairy-free
canned pumpkin is denser; reduce apple quantity by 1-2 apples to avoid excess moisture
Full guide → - 4 apples, chopped
- 1 T butter, meltedpumpkin puree3/4 cup to 1 lb squashingredientdairy-free
canned pumpkin is denser; reduce apple quantity by 1-2 apples to avoid excess moisture
Full guide → - ⅓ cup Golden Monkfruit Sweetener, plus 1 Terythritol or allulose1:1sweetener
both sugar alcohols with similar sweetness, though allulose may caramelize slightly different
- 1 tsp ground cinnamon
- ¼ tsp pumpkin pie spice
- 1 cup rolled oats, buzzed in food processor until partly ground
- ½ cup almond flouroat flour1:1dietary
increases overall oat content; may require 1-2 T extra liquid in crumble
Full guide → - ½ cup Golden Monkfruit Sweetener, plus 1 Terythritol or allulose1:1sweetener
both sugar alcohols with similar sweetness, though allulose may caramelize slightly different
- ¼ C butter, grated from frozenpumpkin puree3/4 cup to 1 lb squashingredientdairy-free
canned pumpkin is denser; reduce apple quantity by 1-2 apples to avoid excess moisture
Full guide →
Instructions
- 1
Preheat oven to 400F/400°F and spray a large glass or crockery casserole dish with non-stick spray.
- 2
Cut butternut squash into half-inch cubes.
- 3
Melt butter in a large non-stick frying pan and begin cooking squash over low heat while you prepare apples.
- 4
Peel and chop apples into small pieces, adding to the pan as you work. Add sweetener, cinnamon, and pumpkin pie spice.
- 5
Cook the mixture until squash is fairly soft, about 10 minutes.
- 6
While mixture cooks, pulse oatmeal in a food processor until it resembles small crumbs.
- 7
Combine the ground oatmeal, almond flour, and sweetener in a bowl.
- 8
Remove butter from freezer and grate it using the large side of a metal grater until you have the required amount.
- 9
Use a pastry blender or fork to work the grated butter into the oat mixture until well distributed and crumbly.
- 10
Transfer the cooked squash and apple mixture to the casserole dish and spread evenly.
- 11
Top with an even layer of crumble mixture.
- 12
Bake for 30 minutes, or until the mixture is slightly bubbling and lightly browned on top.
- 13
Serve hot.
Tips
Grating frozen butter directly into the crumble mixture prevents clumping and distributes fat evenly, creating a tender, flaky texture. Work quickly and return butter to freezer if it softens.
Pulse oats only until they resemble coarse crumbs, not flour. This preserves texture and prevents the topping from becoming dense or cake-like when baked.
Cut squash and apples into similar-sized pieces so they cook evenly. Smaller pieces soften faster and create a smoother filling consistency.
Good to Know
Cover and refrigerate up to 3 days. Reheat gently in a 325F oven for 10-15 minutes or in microwave until warm through.
Prepare filling and crumble topping separately up to 1 day ahead. Assemble and bake just before serving for best crumble texture.
Serve warm. Top with whipped cream, Greek yogurt, or vanilla ice cream if desired.
Common Mistakes
Do not skip freezing the butter before grating to avoid a dense, greasy crumble.
Do not bake longer than 30 minutes to avoid over-browning the topping and losing its tender texture.
Substitutions
Dairy-Free Swaps
source notes this option; coconut oil creates slightly crisper crumble
Full guide →canned pumpkin is denser; reduce apple quantity by 1-2 apples to avoid excess moisture
Full guide →General Alternatives
both sugar alcohols with similar sweetness, though allulose may caramelize slightly different
increases overall oat content; may require 1-2 T extra liquid in crumble
Full guide →FAQ
Can I use fresh pumpkin instead of butternut squash?
Yes. Use fresh pumpkin cubes in the same quantity. Cooking time may vary slightly depending on pumpkin size and density. Alternatively, canned pumpkin puree works; use about 3/4 cup and reduce apples to 2-3 to prevent a soupy filling.
What if I do not have Golden Monkfruit Sweetener?
Erythritol or allulose work as one-to-one substitutes with similar sweetness profiles. Allulose may brown slightly more during baking, which can enhance the topping's appearance. Regular sugar increases carbohydrates but works identically if following a standard diet.
Can I freeze leftovers?
Yes. Cool completely, cover tightly, and freeze up to 2 months. Thaw in the refrigerator overnight. Reheat in a 325F oven for 15-20 minutes or until warmed through. The crumble texture may soften slightly after freezing.