Healthy Blueberry Baked Oatmeal

Meet your new favorite breakfast: Healthy Blueberry Baked Oatmeal! This casserole is comfort food at its finest—warm, hearty, and packed with sweet, juicy blueberries in every bite. The creamy, subtly spiced oats bake up with golden edges and a soft, almost cake-like center.

Not only is this recipe ultra-nourishing and gluten-free friendly, but it's also a total lifesaver for busy mornings. Prep it ahead for effortless breakfasts all week, or serve it up hot for a relaxing weekend brunch the whole family will devour.

Whether you enjoy it plain, with a dollop of yogurt, or drizzled with a bit of maple syrup, this baked oatmeal is wholesome, satisfying, and irresistibly delicious. Trust me, you'll want to make it again and again!

Why You'll Love This Recipe

• Meal prep-friendly: Make it ahead and reheat for speedy, wholesome breakfasts all week.
• Naturally sweetened: Uses maple syrup and berries for gentle sweetness with no refined sugar.
• Versatile and forgiving: Use fresh or frozen blueberries, or swap in your favorite fruit!
• Seriously satisfying: Offers plenty of fiber and protein for lasting energy.

Key Ingredients for Healthy Blueberry Baked Oatmeal

See recipe card below for full list of measurements, ingredients, and instructions.

Old-Fashioned Rolled Oats

Rolled oats are the hearty backbone of this baked oatmeal, lending plenty of texture and nutty flavor. Be sure to use old-fashioned (not quick-cooking) oats for the best chewy bite and to ensure the oatmeal holds together well. If you need this dish to be gluten-free, just double-check for certified gluten-free oats.

Blueberries

These juicy berries give bursts of sweetness and gorgeous color to every slice. You can use either fresh or frozen blueberries—no need to thaw if using frozen, just fold them in and bake. Raspberries, blackberries, or diced apples are great alternatives if blueberries aren’t on hand.

Pure Maple Syrup

This natural sweetener delivers just enough sweetness without overpowering the oats or fruit. Opt for pure maple syrup for the best flavor, but honey or agave syrup can also be used in a pinch. If you prefer a less-sweet breakfast, you can even cut back the amount slightly.

Greek Yogurt

A few spoonfuls of Greek yogurt bring extra creaminess and a boost of protein to keep you full longer. Whole milk or 2% Greek yogurt both work beautifully. For a dairy-free option, substitute with a thick non-dairy yogurt like coconut or almond-based yogurt.

Cinnamon

A sprinkle of cinnamon adds warm, cozy spice that perfectly complements the sweetness of the blueberries. You can also try adding nutmeg, cardamom, or even a little bit of vanilla for extra flavor depth.

Instructions for Healthy Blueberry Baked Oatmeal

See recipe card below for full list of measurements, ingredients, and instructions.

Prep the Baking Dish and Preheat Oven

First, preheat your oven to 375°F (190°C). Lightly grease a 9x9-inch (or similar) baking dish with cooking spray or coconut oil to prevent sticking.

Mix the Dry Ingredients

In a large bowl, combine the rolled oats, baking powder, cinnamon, and salt. Give everything a quick stir to distribute the spices evenly through the oats.

Whisk Wet Ingredients

In a separate medium bowl, whisk the eggs until lightly frothy. Add in the almond milk, Greek yogurt, maple syrup, and vanilla extract. Whisk thoroughly until smooth and fully combined.

Combine and Add Blueberries

Pour the wet mixture into the dry ingredients and stir until just incorporated—don't overmix. Gently fold in 1 1/2 cups of the blueberries, saving the remaining 1/2 cup for topping.

Assemble and Bake

Pour the oat mixture into your prepared baking dish, smoothing the top. Scatter the reserved blueberries and chopped nuts (if using) over the top for a pretty finish. Bake for 35 to 40 minutes, or until the center is just set and the top is golden brown.

Cool and Serve

Let the baked oatmeal cool in the pan for at least 10 minutes before slicing. Serve warm with a dollop of Greek yogurt, a splash of milk, or a drizzle of maple syrup, if desired.

Recipe Variations

Make It Vegan

Swap the eggs for flax eggs (2 tablespoons ground flax + 5 tablespoons water, mixed and left to thicken), use plant-based yogurt, and any non-dairy milk you love. The oatmeal stays moist and delicious!

Add a Citrus Twist

For a bright, zesty kick, stir in 1 to 2 teaspoons of lemon or orange zest with the oats. It pairs beautifully with blueberries and makes the flavors pop.

Mix Up the Fruit

Substitute blueberries with raspberries, sliced strawberries, chopped apples, or a mixed berry blend. Use what’s in season or in your freezer!

Nut-Free Option

Skip the nuts altogether, or replace with sunflower or pumpkin seeds for crunch without any allergens.

Extra Protein Boost

For an even more satiating breakfast, stir in a scoop of vanilla or plain protein powder with the dry ingredients—just increase the milk by an extra 1/4 cup if needed.

Serving Suggestions

Serve Healthy Blueberry Baked Oatmeal warm, topped with a dollop of Greek yogurt and a drizzle of maple syrup for that classic combo. Pair with a side of fresh fruit, a smoothie, or scrambled eggs for a well-rounded, energizing breakfast. It’s also delicious cold or at room temperature as a grab-and-go snack!

Storage and Reheating

Store leftover baked oatmeal, covered, in the refrigerator for up to 5 days. For meal prep, slice into portions and keep them in airtight containers. Reheat individual squares in the microwave for 30-60 seconds, or warm the entire pan in a 325°F (160°C) oven until heated through. This recipe also freezes well—wrap individual slices tightly and freeze up to 3 months. Thaw overnight in the fridge, then reheat as desired.

Frequently Asked Questions About Healthy Blueberry Baked Oatmeal (FAQ)

Q: Can I use quick oats instead of rolled oats?
A: Rolled oats give the best texture and structure, but if you only have quick oats, you can use them—the dish will be a bit softer and less chewy.

Q: Can I make this baked oatmeal ahead of time?
A: Absolutely! You can prep and bake it in advance, then store in the fridge for easy breakfasts throughout the week.

Q: Is this recipe gluten-free?
A: Yes, as long as you use certified gluten-free oats. All the other ingredients are naturally gluten-free!

Q: Can I bake this in muffin tins for grab-and-go servings?
A: Yes! Divide the mixture among muffin cups and bake for about 20–25 minutes. Perfect for busy mornings.

Craving healthy comfort food? This Healthy Blueberry Baked Oatmeal truly delivers—it's simple, nourishing, and endlessly customizable. I can't wait for you to try it! If you make this recipe, let me know how it turned out by leaving a comment or rating below. Enjoy every delicious bite!