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Sourdough Apple Crisp topped with ice cream on a blender and white plate with a red baking dish of crisp in the background.
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Sourdough Apple Crisp

Warm, cozy, and full of fall flavor, this sourdough apple crisp recipe combines tender apples with warm spices and a sweet, buttery oat crumble made with sourdough starter.
Prep Time15 minutes
Cook Time1 hour 50 minutes
Course: Dessert
Cuisine: American
Keyword: quick, sourdough, summer desserts, summer recipes
Servings: 8
Calories: 351kcal
Author: Amy

Equipment

  • Baking Dish

Ingredients

Apple filling

Sourdough Topping

  • 1/3 cup sourdough starter discard or active
  • 1/2 cup brown sugar
  • 2/3 cup all-purpose flour
  • 1 teaspoon cinnamon
  • 1/8 teaspoon salt
  • 1/2 cup unsalted butter softened
  • 1 cup quick oats or old-fashioned oats

Instructions

  • Preheat your oven to 350°F. Butter a baking dish or cast iron skillet. In a medium bowl, combine flour, brown sugar, cinnamon, and oats. Using your hands, work in the softened butter until the mixture is crumbly and well combined.
  • Stir in the sourdough starter until fully incorporated. Set aside.
  • Slice apples (peel if desired) and place them in a large bowl. Add brown sugar, cinnamon, vanilla, salt, and cornstarch (or arrowroot). Toss until evenly coated.
  • Pour the apple filling into the prepared baking dish and spread evenly. Sprinkle the sourdough oat topping over the apples in an even layer. Options: sprinkle the top of the crisp with a little white sugar for extra sweetness.
  • Bake for 45–50 minutes, or until the topping is golden brown and the apples are soft and bubbling.
  • Let the crisp cool for at least 10 minutes before serving.

Notes

  • You can peel the apples if you’d like, but I never bother. The skins add fiber, nutrients, and a bit of texture.
  • Don’t slice the apples too thinly; thicker slices hold their shape better and won’t turn mushy.
  • Want an extra crisp topping? Add a small handful of chopped nuts, like pecans or walnuts.
  • The topping can be long fermented. Check blog post FAQ for instructions.

Nutrition

Calories: 351kcal | Carbohydrates: 59g | Protein: 3g | Fat: 13g | Saturated Fat: 7g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 3g | Trans Fat: 0.5g | Cholesterol: 31mg | Sodium: 84mg | Potassium: 193mg | Fiber: 4g | Sugar: 37g | Vitamin A: 407IU | Vitamin C: 5mg | Calcium: 43mg | Iron: 1mg