Fat Free Apple Crumble Recipe: Warm Spiced Filling Under Crunchy Topping

This plant-based dessert proves you don’t need butter to achieve a perfectly crisp topping and tender, spiced apple filling.

With simple swaps and no added fat, this crumble delivers all the comfort of the classic—warm, fragrant, and utterly satisfying.

Ingredients for Fat Free Apple Crumble

Warm spiced apples under a crisp oat topping with zero added fat.

The apples are the star here—Granny Smith holds up best to baking, but Honeycrisp or Braeburn work too. Whole Foods or your local farmers market usually have the freshest picks. For the oats, make sure they’re old-fashioned rolled (not quick or steel-cut). Bob’s Red Mill is a solid brand if you’re unsure. The brown sugar adds moisture as much as sweetness, so don’t skimp on the amount.

No apple cider? Apple juice works in a pinch (just reduce the sweetener slightly). Swap walnuts for pecans or almonds if that’s what’s in your pantry. Out of cornstarch? Arrowroot powder at the same amount does the trick. The flour can be subbed with almond flour for a gluten-free version, though the texture will be slightly different. King Arthur makes a great whole wheat option.

This keeps 3-4 days at room temperature, covered tightly. The topping softens over time, but a quick broil revives the crunch. Freeze for up to 3 months—thaw overnight before reheating. Best served warm, straight from the oven.

Step-by-Step Instructions for Apple Crumble

Here’s how I make this dessert with zero added fat but all the comfort.

Step 1: Prepare the Apple Filling

Peel, core, and slice the 6 whole Granny Smith Apples thinly into a large bowl. I use a mandoline for even slices, but a sharp knife works too. Toss immediately with the 1 tbsp Lemon Juice to prevent browning and brighten the flavor.

In a small bowl, whisk together the 1 tbsp Cornstarch, 0.25 cup Apple Cider, 0.75 cup Light Brown Sugar (packed), 1 tsp Ground Cinnamon, 0.25 tsp Ground Nutmeg, 1 tsp Vanilla Extract, and 0.25 tsp Salt until smooth. Pour this over the apples and toss gently to coat evenly. The mixture should look glossy and slightly thickened.

Step 2: Make the Crumble Topping

In a separate bowl, combine the 1.5 cups Old-Fashioned Rolled Oats, 0.5 cup Whole Wheat Flour, the remaining 0.5 tsp Ground Cinnamon from your total, and the 0.5 cup Chopped Walnuts. I like to toast the oats and walnuts first for extra crunch, but it’s optional.

Mix until everything is evenly distributed. The topping should look dry and crumbly—this is normal since we’re not using any fat. The oats will crisp up beautifully in the oven, and the nuts add that satisfying texture without added oil.

Step 3: Assemble and Bake

Transfer the apple mixture to a greased 8×8-inch baking dish or similar, spreading it into an even layer. Pour any remaining liquid from the bowl over the top. Then, sprinkle the oat mixture evenly over the apples, pressing down lightly to help it adhere.

Bake at 375°F for 40-45 minutes until the topping is golden brown and the filling is bubbling at the edges. You’ll know it’s done when the apples are tender when pierced with a knife and the topping looks crisp. If it browns too quickly, tent with foil for the last 10 minutes.

Step 4: Rest and Serve

Let the crumble cool for 10 minutes before serving. This allows the filling to set slightly so it doesn’t run out when you scoop it. The topping will firm up as it cools, but it should still have a satisfying crunch.

Serve warm as-is or with a dollop of fat-free yogurt. The apples should be soft but not mushy, and the topping should provide a perfect contrast with its crisp texture. This dish keeps well for 2-3 days covered at room temperature, though it’s best fresh from the oven.

Storing and Reheating This fat free apple crumble

Room Temperature Storage

Let this dish cool completely, then cover tightly with plastic wrap or a lid. It stays fresh at room temperature for 2-3 days. The topping softens over time, but the flavors deepen beautifully. 💡

Fridge for Longer Freshness

For extended storage, refrigerate in an airtight container for up to 5 days. The cold makes the topping less crisp, but it regains texture when reheated. I always label mine with the date.

Freezing for Future Cravings

Portion into freezer-safe containers with ½ inch headspace. Freeze for up to 3 months without quality loss. Thaw overnight in the fridge before reheating. ❄️

Oven Reheating Method

Preheat to 350°F, cover with foil, and warm for 15-20 minutes. Uncover the last 5 minutes to crisp the topping. This method preserves the texture best.

Microwave Quick Fix

Microwave individual servings on 50% power for 1-2 minutes, stirring halfway. Add a splash of water to prevent drying. The topping won’t be as crisp, but it’s fast.

Reviving the Crunch

If your topping lost its crispness, broil for 2-3 minutes until golden. Watch closely to avoid burning. This trick works for both refrigerated and thawed portions.

Frequently Asked Questions