Baked Oatmeal Muffins with Blueberries, Mini Chocolate Chips, and Walnuts

By AislePrompt Test Kitchen · Reviewed by AislePrompt Editorial · ·

Soft baked oatmeal muffins enriched with fresh blueberries, mini chocolate chips, and crunchy walnuts, perfect for a kid-friendly breakfast or snack. This american-inspired breakfast ready in about 35 minutes pairs old-fashioned rolled oats, baking powder, ground cinnamon for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 180 calories and feeds 12, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart.

★ 4.5 (15 ratings) Prep: 10 min Cook: 25 min Serves 12 American cuisine 180 cal/serving
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Ingredients

Instructions

  1. Step 1: Preheat oven to 350°F (175°C). In a large bowl, combine 1 1/2 cups old-fashioned rolled oats, 1 teaspoon baking powder, 1/2 teaspoon ground cinnamon, and 1/4 teaspoon salt, mixing well.
  2. Step 2: In a separate bowl, whisk together 1 cup milk, 1 large egg, 1/4 cup maple syrup, and 1 teaspoon vanilla extract until smooth.
  3. Step 3: Pour the wet mixture into the dry ingredients and stir just until combined; fold in 3/4 cup fresh blueberries, 1/4 cup mini chocolate chips, and 1/3 cup chopped walnuts gently.
  4. Step 4: Spoon the batter evenly into a greased or lined 12-cup muffin tin, filling each cup about 3/4 full.
  5. Step 5: Bake for 22-25 minutes until the tops are set and a toothpick inserted into the center comes out clean. Let cool for 10 minutes before serving.

Frequently asked questions

How long does Baked Oatmeal Muffins with Blueberries, Mini Chocolate Chips, and Walnuts take to make?

Total time is about 35 minutes (10 min prep + 25 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.

How do I store leftover Baked Oatmeal Muffins with Blueberries, Mini Chocolate Chips, and Walnuts?

Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat covered in a 350°F oven for 10-12 minutes, or microwave at 70% power in 60-second bursts to keep old-fashioned rolled oats from drying out.

Can I substitute ingredients in Baked Oatmeal Muffins with Blueberries, Mini Chocolate Chips, 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 Muffins with Blueberries, Mini Chocolate Chips, and Walnuts for a different number of people?

The recipe is written for 12 servings. Multiply each ingredient by (your serving target / 12). 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.

What goes well with Baked Oatmeal Muffins with Blueberries, Mini Chocolate Chips, and Walnuts?

American breakfast like this pair well with a simple grain (rice, couscous, or crusty bread), a quick salad with acid (lemon vinaigrette, pickled onions), and a pan sauce or yogurt-based dip. Tap "Plan a meal with the AI" to get specific side suggestions.

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