Blueberry Baked Oatmeal

This easy baked oatmeal recipe is full of good-for-you goodies. Made with old-fashioned oats, fresh blueberries, and agave, among other things, it’s our go-to busy morning breakfast idea!

Eating a healthy breakfast during the school week can be a challenge, especially since my now tweenager has decided they can do everything by themselves. Could they cook up some cheesy scrambled eggs or a batch of brown sugar oatmeal? For sure. Will they get up early enough to do it? Not a chance.

That’s where this blueberry baked oatmeal comes in. It requires hardly any effort to make and has good-for-you things like old-fashioned oats, fresh blueberries, agave, eggs, and milk in it. Plus some cinnamon and vanilla for flavor. I’ll throw it together on a Sunday, bake it, then pop it in the fridge for the week. This way my kiddo can “make their own breakfast” by cutting off a slice, warming it in the microwave, and drizzling some honey on top. They feel happy that mom is staying out of the way, and I feel good that they’re getting a nutritious start to the day. 🙂

What is Baked Oatmeal?

Baked oatmeal is exactly what it sounds like. Oatmeal that is baked in the oven instead of cooked in the microwave or on the stovetop. The benefit of going the oven route is that you can make a very big batch of oatmeal in advance, then store it in the fridge for quick meals during the week. This is one of our favorite make-ahead breakfasts.

Blueberry Baked Oatmeal in a baking dish

Recipe Ingredients

Here’s what you’ll need to make this recipe. Be sure to scroll down to the recipe card below for specific amounts.

  • Old fashioned oats – Don’t try and use instant or steel-cut oats, they require a different cooking time and water-to-oats ratio. (I have an awesome steel-cut oat recipe if you’re hankering for those kinds of oats.)
  • Baking powder
  • Kosher salt
  • Cinnamon – You could also add nutmeg, cardamom, cloves, allspice, or even pumpkin pie spice. Cloves and allspice are more pungent than cinnamon so reduce the amount of those if you try them, or you could add a dash along with the cinnamon.
  • Milk – I used regular cow’s milk but you could use any kind of milk, including plant-based milk.
  • Blueberries – Fresh blueberries work best. You can also use frozen berries but they will color your oats a bit. Other tasty fruit mix-ins would be blackberries, raspberries, or chopped and drained fresh strawberries.
  • Applesauce – Unsweetened applesauce is best.
  • Agave – You could also use honey or maple syrup.
  • Eggs – This recipe uses up 4 eggs! Using up eggs always makes me happy.
  • Vanilla

How to Make Baked Oatmeal

Making this recipe is so easy! Here’s a quick rundown:

  1. Prep your tools. Spray a 9×13 baking dish with PAM. Preheat your oven to 350F.
  2. Mix the dry ingredients in a medium bowl. This includes the oats, baking powder, salt, and cinnamon.
  3. Mix the wet ingredients in a large bowl. This is the milk, applesauce, agave, eggs, and vanilla. Whisk until everything is combined.
  4. Add the dry ingredients to the wet ingredients. Mix well until there are no dry bits of batter visible.
  5. Fold in the berries. Just gently mix them in.
  6. Bake. Pour into your prepared 9×13 baking dish and bake for 45 minutes, until the edges are golden and the center of your baked oatmeal is set. (So when you press on it lightly with your fingertips it will feel firm.)

That’s it! You can easily half this recipe and bake it in a 9×9 dish as well. The baking time will change slightly to around 40 minutes.

Blueberry Baked Oatmeal in a baking dish and on a plate with honey

Serving Suggestions

This baked oatmeal recipe is not overly sweet on its own and that is on purpose. With just enough sweetness it’s the perfect vehicle for your favorite toppings!

We like to serve a warm slice with a drizzle of maple syrup or honey, plus a dollop of whipped cream. (Maple whipped cream is lovely with this recipe.) You can also sprinkle more fresh fruit on top, or even add chopped nuts like walnuts or almonds. My husband likes to pour a splash of milk on top of his baked oatmeal too.

How to Store and Reheat Baked Oatmeal

Let your oatmeal cool to room temperature, then cover your 9×13 dish with saran wrap and store it in the fridge. The baked oatmeal will keep for up to 5 days.

To reheat, simply cut off a square of oatmeal and place it in a microwave-safe bowl. I like to cut my slice into at least a couple of pieces so that the insides warm through. Zap it for about 1 minute 30 seconds, or until it reaches your desired temperature. Serve with your favorite fixings!

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Blueberry Baked Oatmeal

Blueberry Baked Oatmeal in a baking dish
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This easy baked oatmeal recipe is full of good-for-you goodies. Made with old-fashioned oats, fresh blueberries, and agave, among other things, it’s our go-to busy morning breakfast idea!

  • Author: Rustic Family Recipes
  • Prep Time: 5 minutes
  • Cook Time: 45 minutes
  • Total Time: 50 minutes
  • Yield: 10-12 servings
  • Category: Breakfast
  • Method: Oven
  • Cuisine: American

Ingredients

  • 4 cups old fashioned oats
  • 2 teaspoons baking powder
  • 1 teaspoon kosher salt
  • 1 teaspoon ground cinnamon
  • 3 cups milk
  • 1 cup applesauce
  • 2/3 cup agave
  • 4 large eggs
  • 2 teaspoons vanilla
  • 2 cups fresh blueberries

Instructions

Prep your tools. Spray a 9×13 baking dish with PAM. Preheat your oven to 350F.

Mix the dry ingredients in a medium bowl. Combine the oats, baking powder, kosher salt, and cinnamon. Set aside.

Mix the wet ingredients in a large bowl. Combine the milk, applesauce, agave, eggs, and vanilla. Whisk well until everything is combined.

Add the dry ingredients to the wet ingredients. Pour the dry ingredients into the wet ingredients and mix well until you don’t see any dry bits of batter.

Fold in the berries. Just gently mix them in.

Bake. Pour into your prepared 9×13 baking dish and bake for 45 minutes, until the edges are golden and the center of your baked oatmeal is set. (So when you press on it lightly with your fingertips it will feel firm.)

Notes

  • Allow to cool to room temperature, then cover with saran wrap and store in the fridge for up to 5 days.
  • Reheat individual slices in the microwave until warmed through and serve with your favorite fixings.

Keywords: baked oatmeal recipe, oatmeal bake, blueberry oatmeal, make ahead breakfast

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Reader Questions and Reviews

  1. I just wanted to tell you I have been making this baked oatmeal recipe every single week. It’s so easy and makes a healthy breakfast quick in the AM! Would love it if you posted more recipes like this!!

    1. Rustic Family Recipes

      I make this recipe a lot too, so glad you like it! I will work on adding more baked oatmeal recipes to the site. I make a few other versions, especially in the fall/winter. 🙂