If you’re looking for a breakfast dish that’s both nutritious and indulgent, blueberry baked oatmeal is the answer.
With its golden, slightly crisp top and soft, custard-like interior, this baked oatmeal is a crowd-pleaser that’s easy to make and even easier to love.
Follow this detailed recipe to create a dish that’s as delicious as it is wholesome.

Ingredients You’ll Need
To make this blueberry baked oatmeal, gather the following ingredients. Using fresh, high-quality components ensures the best flavor and texture:
- 2 cups old-fashioned rolled oats (use gluten-free oats if needed)
- 1 teaspoon baking powder
- 1/2 teaspoon salt
- 1 teaspoon ground cinnamon
- 1/4 teaspoon ground nutmeg (optional, for extra warmth)
- 2 cups milk (dairy or plant-based)
- 1/3 cup maple syrup or honey (adjust to taste)
- 1 large egg (or 1 flax egg for a vegan option)
- 2 teaspoons vanilla extract
- 2 tablespoons melted butter or coconut oil
- 1 1/2 cups fresh or frozen blueberries (divided)
- Optional toppings: additional blueberries, sliced almonds, or a drizzle of maple syrup
Step-by-Step Instructions
1. Preheat the Oven and Prepare the Dish
Start by preheating your oven to 375°F (190°C). Lightly grease an 8×8-inch or 9×9-inch baking dish with butter or cooking spray.
This step ensures the baked oatmeal doesn’t stick to the dish and makes cleanup easier.
2. Mix Dry Ingredients
In a large mixing bowl, combine the rolled oats, baking powder, salt, cinnamon, and nutmeg (if using).
Stir well to evenly distribute the spices and leavening agent. The cinnamon and nutmeg will infuse the oatmeal with warm, comforting flavors.
3. Combine Wet Ingredients
In a separate bowl, whisk together the milk, maple syrup (or honey), egg, vanilla extract, and melted butter (or coconut oil). Whisk until the mixture is smooth and well combined.
The wet ingredients will bind the oats together and create a custard-like texture as the oatmeal bakes.
4. Combine Wet and Dry Ingredients
Pour the wet mixture into the bowl with the dry ingredients. Stir gently until everything is evenly combined. Be careful not to overmix, as this can make the oatmeal dense.
5. Add Blueberries
Fold in 1 cup of the blueberries, reserving the remaining 1/2 cup for the topping.
The blueberries will burst during baking, releasing their sweet, tangy juices and creating pockets of flavor throughout the oatmeal.
6. Transfer to the Baking Dish
Pour the oatmeal mixture into the prepared baking dish, spreading it out evenly with a spatula.
Scatter the remaining 1/2 cup of blueberries over the top. This step ensures every bite is bursting with blueberry goodness.
7. Bake to Perfection
Place the dish in the preheated oven and bake for 35–40 minutes, or until the top is golden brown and the center is set. To check for doneness, insert a toothpick into the center — it should come out clean or with a few moist crumbs.
8. Cool and Serve
Remove the baked oatmeal from the oven and let it cool for 5–10 minutes before slicing. This allows the dish to set and makes it easier to cut into neat squares or rectangles. Serve warm with your favorite toppings, such as additional blueberries, sliced almonds, or a drizzle of maple syrup.
Tips for Perfect Blueberry Baked Oatmeal
- Use Fresh or Frozen Blueberries: Both work well, but if using frozen berries, do not thaw them beforehand to prevent excess moisture.
- Adjust Sweetness: Taste the mixture before baking and adjust the amount of maple syrup or honey to suit your preference.
- Customize the Recipe: Swap blueberries for other fruits like raspberries, diced apples, or bananas.
- Make It Vegan: Use a flax egg (1 tablespoon ground flaxseed + 3 tablespoons water) and plant-based milk and butter.
- Double the Batch: This recipe doubles easily for larger crowds or meal prep. Use a 9×13-inch baking dish for a larger batch.
Why This Recipe Works
Blueberry baked oatmeal is a perfect balance of simplicity and indulgence. The rolled oats provide a hearty, fiber-rich base, while the blueberries add natural sweetness and a burst of flavor.
The combination of milk, egg, and melted butter creates a custard-like texture that’s both creamy and satisfying. Warm spices like cinnamon and nutmeg elevate the dish, making it feel like a treat while still being wholesome and nutritious.
Serving Suggestions
This baked oatmeal is incredibly versatile and can be enjoyed in many ways:
- Breakfast: Serve warm with a dollop of yogurt or a splash of milk.
- Brunch: Pair with scrambled eggs and a side of fresh fruit for a complete meal.
- Dessert: Top with a scoop of vanilla ice cream or whipped cream for a sweet treat.
- Meal Prep: Cut into squares and store in the fridge for quick, grab-and-go breakfasts throughout the week.
Storing and Reheating
Store any leftovers in an airtight container in the refrigerator for up to 5 days. To reheat, place a portion in the microwave for 30–60 seconds or warm it in the oven at 350°F (175°C) for 10–15 minutes. You can also freeze baked oatmeal for up to 3 months. Thaw overnight in the fridge and reheat before serving.
Frequently Asked Questions
Can I use quick oats instead of rolled oats?
Quick oats will work, but the texture will be softer. Rolled oats provide a chewier, heartier consistency.
Can I make this recipe ahead of time?
Yes! Assemble the mixture the night before, cover it, and refrigerate. Bake it in the morning for a fresh, hot breakfast.
What can I use instead of blueberries?
Try other berries, diced apples, pears, or even chocolate chips for a different twist.
Meta Description
Start your day with this delicious blueberry baked oatmeal recipe, featuring juicy blueberries, warm spices, and a custard-like texture — perfect for breakfast or brunch.