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This blueberry baked oatmeal comes out soft, warm, and packed with sweet blueberries in every bite.

Baked Oatmeal with Blueberries
Making overnight oats is one of the easiest ways to prep breakfast ahead, but nothing beats a warm bowl of oatmeal. On weekends, when I have a little extra time, this baked oatmeal with blueberries is my go-to. It takes minutes to prep, the oven does the cooking, and the result is a soft, hearty bake with sweet blueberries in every bite.
Why It’s Good For You
This blueberry baked oatmeal has fiber and complex carbs from the oats that keep you fuller for longer, and the blueberries naturally sweeten it and add fiber, vitamins, and antioxidants.
Ingredients
Old-fashioned oats hold out best for baked oatmeal recipes. A little baking powder gives these a lighter texture, and a little salt for flavor. Milk, dairy or non-dairy, is the liquid in which the oats will cook; an egg holds them together, a little butter and vanilla for flavor, and a little honey is optional for a touch of sweetness.
How to Make Blueberry Baked Oatmeal
In the recipe card, you’ll find full directions and a short video showing you how the recipe is made. Here is what you need to know:
- Make the oatmeal mixture.
In a large bowl, combine all the liquid ingredients. Then add the dry ingredients and mix. At the end, fold in the blueberries. - Bake it.
Lightly spray the baking dish, then pour the blueberry oat mixture. Bake it until the top is golden and the middle is set, for about 35 minutes. - Serve it.
Give it a few minutes to cool, then spoon it into a bowl and top with a drizzle of milk, some yogurt for added protein, or your favorite oatmeal toppings.

Bake ahead
Prepare as directed, let cool to room temp, then cover and refrigerate overnight. Reheat at 375F for 10 minutes or microwave a portion for 1-2 minutes. Leftovers keep in the fridge for up to 4 days.
More Baked Oatmeal Recipes
Make these and come back for this pumpkin baked oatmeal, or this cranberry orange baked oats. Oatmeal Recipe never disappoints!
Blueberry Baked Oatmeal

Watch how it’s made:
Ingredients
- 2 cups rolled oats
- 1 teaspoon baking powder
- ½ teaspoon salt
- ¼ cup honey or maple syrup, optionanl
- 2 cups milk, any
- 1 large egg
- 2 tablespoons butter, melted
- 2 teaspoons vanilla
- 1 ½ cups blueberries, fresh or frozen
Instructions
Prep:
- Preheat the oven to 375F, with the top rack in the middle position, and grease a 9 x 9-inch square baking dish.
- In a large bowl, combine the milk, egg, honey, melted butter, and vanilla. Add the dry ingredients to the bowl, and mix well. Add the blueberries to the bowl, and gently fold to combine. If using frozen blueberries, there's no need to thaw.
- Pour the mixture into the baking dish. With a spoon, stir to evenly distribute the blueberries in the dish.
Bake:
- Bake it in the preheated oven for 35 minutes, until the top is golden and the oat mixture is set in the middle. Remove it from the oven and let it cool down slightly before serving.
Serve & store:
- Spoon the baked oatmeal with blueberries into bowls. Pour a little extra milk or spoon yogurt over the top for added protein, or enjoy as is.
- Cooled leftovers will keep in the fridge (covered) for up to 4 days. To reheat, warm them in the microwave with a little liquid (milk or water) to soften, for 30 seconds to 1 minute.






Nelly says
This was easy to make and my daughter who is picky even ate it! I’m going to try with chocolate chips next time.
Missa says
My son and I loved this!!
My daughter is allergic to eggs – any ideas on how to make it “set up” without an egg?
Laura Fuentes says
Make a flax egg substitute. easy! will work great.
April says
This recipe was very disappointing. I followed it exactly except added cinnamon. It was very watery and despite longer cooking time, it didn’t seem to set. It had the same consistency as stovetop oatmeal so really what’s the benefit of this long cooking time if it’s like regular oatmeal. I used regular rolled oats and exact ingredients. Since I used organic ingredients, it was an expensive “experiment”.
Laura Fuentes says
Did you omit the egg? I make this baked oatmeal every single week. And it calls for old fashion oats (I’m assuming that’s what you mean by regular rolled oats).
April says
I’m coming back to amend my review. Yes I used rolled oats. After the oatmeal sat for about 30 minutes it seemed at set up more. If I make it again I may use less milk. I did use an egg and followed everything closely. Thanks.
April says
Looks so good. Plan to make soon for my son and myself. Hubby won’t eat oatmeal. Going to add walnuts too for some extra protein. Quick question—since just two are eating, would it store okay in fridge for a couple of days? Thanks so much!
Laura Fuentes says
Absolutely. This refrigerates well, up to 4 days. Simply heat and add a little liquid (like milk) and enjoy. It tastes like cake. Feels like bread pudding… but it’s made with oats.
Jeanne says
Just took this out of the oven, looks wonderful. A small bite proved it is just what I’m looking for. I added a few walnuts I had left over from making banana bread. I plan to add some cinnamon and apples in the future. Love the make ahead idea.
Laura Fuentes says
I bet it was delicious with added walnuts. Thanks for trying my recipe!