Baked Oatmeal Squares with Mixed Berries and Walnuts
These wholesome baked oatmeal squares combine hearty oats with juicy mixed berries and crunchy walnuts for a naturally sweet, healthy dessert or snack. This american-inspired desserts (gluten free option) ready in about 50 minutes layers rolled oats, baking powder, ground cinnamon 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 180 calories and feeds 9, 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
- 2 cups rolled oats
- 1 tsp baking powder
- 1/2 tsp ground cinnamon
- 1/4 tsp salt
- 1 1/2 cups unsweetened almond milk
- 1/3 cup pure maple syrup
- 2 large eggs
- 1 tsp vanilla extract
- 1 cup mixed berries (fresh or frozen)
- 1/2 cup chopped walnuts
Instructions
- Step 1: Preheat oven to 350°F. In a large bowl, combine 2 cups rolled oats, 1 tsp baking powder, 1/2 tsp ground cinnamon, and 1/4 tsp salt, mixing well.
- Step 2: In a separate bowl, whisk together 1 1/2 cups unsweetened almond milk, 1/3 cup pure maple syrup, 2 large eggs, and 1 tsp vanilla extract until smooth.
- Step 3: Pour the wet ingredients into the oat mixture and stir until combined. Gently fold in 1 cup mixed berries and 1/2 cup chopped walnuts.
- Step 4: Transfer the batter to a greased 8x8-inch baking pan, spreading evenly. Bake for 35-40 minutes until the top is golden and a toothpick inserted in the center comes out clean.
- Step 5: Let cool for 10 minutes before cutting into squares. Serve warm or at room temperature.
Equipment for this recipe
Top-rated tools to make this recipe successfully.
Frequently asked questions
How long does Baked Oatmeal Squares with Mixed Berries and Walnuts take to make?
Total time is about 50 minutes (10 min prep + 40 min cook). Most home bakers find this fits a weekend afternoon; chill or store as the recipe directs before serving.
How do I store leftover Baked Oatmeal Squares with Mixed Berries and Walnuts?
Cool fully before storing. Most baked desserts keep at room temperature in an airtight container for 2–3 days, or in the fridge for up to 5 days. Cream- or custard-based desserts must go in the fridge within 2 hours; reheat gently or serve cold per the recipe.
Can I substitute ingredients in Baked Oatmeal Squares with Mixed Berries and Walnuts?
Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.
How do I scale Baked Oatmeal Squares with Mixed Berries and Walnuts for a different number of people?
The recipe is written for 9 servings. Multiply each ingredient by (your serving target / 9). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.
Is Baked Oatmeal Squares with Mixed Berries and Walnuts gluten free option?
Yes — this recipe is tagged gluten free option based on its ingredient list. Always cross-check labels for packaged ingredients (sauces, broths, condiments) since formulations vary by brand.
