Easy Apple Crisp with Oat and Walnut Crumble Topping
This comforting apple crisp combines tart and sweet apples with warm cinnamon in a tender, juicy filling topped with a golden oat crumble. The topping features old-fashioned oats, brown sugar, and chopped walnuts that bake into a delightfully crunchy contrast to the soft spiced apples beneath. Perfect for fall gatherings, weeknight desserts, or whenever you crave a homestyle treat that fills the kitchen with irresistible aromas. The recipe strikes an ideal balance between simplicity and flavor, requiring just basic pantry ingredients and straightforward techniques that deliver bakery-quality results every time.
Ingredients
- 4 apples, thinly sliced, mix of tart and sweet to equal 7 cups
- ¼ cup granulated sugar
- 2 tablespoons all-purpose flouralmond flour3/4:1gluten-freelow-carbgluten-free
May create denser texture
- 1 teaspoon lemon juice
- 1 teaspoon ground cinnamon
- 1 cup old fashioned oats
- ½ cup all-purpose flouralmond flour3/4:1gluten-freelow-carbgluten-free
May create denser texture
- ⅓ cup brown sugar, packed
- ¼ cup walnuts, chopped
- 1 teaspoon cinnamon
- ½ cup butter, diced
Instructions
- 1
Preheat oven to 350 degrees
- 2
Peel and thinly slice apples using a mixture of tart and sweet varieties until you have 7 cups
- 3
Toss apple slices with flour, granulated sugar, lemon juice and cinnamon in a large bowl
- 4
Combine oats, flour, brown sugar, walnuts, and cinnamon in a medium bowl
- 5
Cut butter into cubes and cut into oat mixture until it forms a crumble using a fork or dough cutter
- 6
Spray an 8x8 dish with nonstick cooking spray
- 7
Pour in apples and top with oat mixture, spreading evenly
- 8
Bake for 40-45 minutes until top is golden brown and sides are bubbly
Tips
Use a mix of apple varieties like Granny Smith and Honeycrisp for the best balance of tart and sweet flavors that hold their shape when baked.
Cut butter into small cubes and work it into the oat mixture until it resembles coarse crumbs for the perfect crumbly topping texture.
Check for doneness by looking for golden brown topping and bubbling around the edges, which indicates the apples are tender and cooked through.
Good to Know
Cover and refrigerate for up to 3 days. Reheat individual portions in microwave or oven until warmed through.
Can assemble up to 4 hours ahead and refrigerate before baking. Add 5-10 extra minutes to baking time if baking from cold.
Best served warm, optionally topped with vanilla ice cream, whipped cream, or caramel sauce.
Common Mistakes
Do not overmix the topping to avoid dense, heavy crumbles.
Do not skip preheating the oven to ensure even browning and proper cooking time.
Do not slice apples too thick or they may not cook through in the specified time.
Substitutions
Dairy-Free Swaps
Gluten-Free Swaps
General Alternatives
FAQ
Can I use different types of apples for this recipe?
Yes, mixing tart apples like Granny Smith with sweet varieties like Honeycrisp or Gala creates the best flavor balance and texture.
What if I don't have old-fashioned oats?
Quick oats can work but will create a less textured topping. Avoid instant oats as they will become mushy during baking.
How long does leftover apple crisp keep?
Store covered in refrigerator for up to 3 days. Reheat portions in microwave or warm oven before serving for best texture.