Baked Oat and Walnut Fruit Crisp

By AislePrompt Editorial · Published 2026-06-07 · Updated 2026-06-07

A wholesome baked fruit crisp combining oats, walnuts, and mixed berries for a comforting yet healthy dessert. This American-inspired recipe (vegetarian), ready in about 55 minutes, layers rolled oats, chopped walnuts, whole wheat flour into a dessert worth slowing down for — great for weekend baking, holiday tables, or any time you want a sweet payoff at the end of a meal. Each serving lands at about 220 calories and feeds 6, so it slots into a weekend bake or a special-occasion dessert tray. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Ingredients

• 1 cup rolled oats
• 1/2 cup chopped walnuts
• 1/4 cup whole wheat flour
• 1/4 cup brown sugar
• 1 tsp cinnamon
• 3 tbsp unsalted butter
• 3 cups mixed berries (blueberries, raspberries, blackberries)
• 1 tbsp lemon juice
• 2 tbsp maple syrup
• 1 tbsp cornstarch

Instructions

1. Step 1: Preheat oven to 350°F. In a large bowl, combine 3 cups mixed berries, 1 tbsp lemon juice, 2 tbsp maple syrup, and 1 tbsp cornstarch. Toss gently to coat and transfer to a greased 8x8-inch baking dish.
2. Step 2: In another bowl, mix 1 cup rolled oats, 1/2 cup chopped walnuts, 1/4 cup whole wheat flour, 1/4 cup brown sugar, and 1 tsp cinnamon.
3. Step 3: Melt 3 tbsp unsalted butter in a small saucepan over low heat until fully melted. Pour the melted butter into the oat mixture and stir until crumbly.
4. Step 4: Evenly sprinkle the oat and walnut topping over the berry mixture in the baking dish.
5. Step 5: Bake in the preheated oven for 35-40 minutes until the topping is golden brown and the berry juices are bubbling around the edges.
6. Step 6: Allow to cool for 10 minutes before serving warm.