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Baked Blueberry Oatmeal

By Jess Smith

4.8

Published Oct 05, 2020•Updated Oct 05, 2022

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Baked oatmeal takes just a few minutes to prepare and then the oven does the rest of the work. It’s great for make-ahead / meal prep breakfasts or for serving a crowd.

If you’ve never made baked oatmeal before, let me tell you the real reason to make it. It’s not because it’s simple or convenient or great for meal prep or great for a crowd (though it is all of those things). The real reason to make baked oatmeal because it will make your entire kitchen smell like it has been wrapped up in a cozy, warm, cinnamon-laced blanket. Which is exactly what we need this time of year.

I hadn’t made baked oatmeal in a few years, but I returned to my go-to recipe again this year because we are all still home on weekday mornings. My first graders are still taking their classes online and my husband and I are still working out of the house. It means many moments feel crazy, but our mornings feel more relaxed than they did when we had to get everyone out the door by 8am. And since I figured others might be in a similar boat, this delicious oatmeal method felt worth revisiting. 

Baked oatmeal does require some time in the oven (about 35 minutes), but it only takes 10 minutes of prep to get everything ready for baking. The leftovers can be easily sliced into individual portions and then breakfast is ready for the whole week. Or if you just don’t have that much time in the morning but still want to get your oats fix, check out my make-ahead Mason Jar Overnight Oats that you can just grab out of the fridge as you run out of the door in the morning.

Ingredients

• Milk – Use any type of milk. I use cow’s milk or almond milk, depending on what we have. I’ve also used apple juice in the past which adds enough sweetness that you can easily reduce (or omit) the added sugar.
• Oats – Be sure to use “Rolled Oats” or “Old-Fashioned Oats”. Instant or Quick-Cook Oats won’t work properly in this recipe. 
• Baking Powder – The baking powder helps the baked oatmeal to puff slightly as it bakes, giving it a lighter texture and creating slices that can be cut into individual portions. 
• Brown Sugar, Pure Vanilla Extract, Cinnamon, Eggs – Just regular baking / fridge staples. The eggs help the oatmeal to firm up.
• Blueberries and Pecans – This version of baked oatmeal is made with fresh or frozen blueberries and chopped pecans, but almost any of your favorite oatmeal mix-ins will work. See below for a few ideas!

How to Make Baked Oatmeal

It’s so easy!

1. Whisk together wet ingredients and spices.
2. Add oats and any fruit or nuts to a greased baking pan.
3. Pour wet ingredients over dry and stir gently to combine. 
4. Cover and bake until the oatmeal is golden on the top and all of the liquids have been absorbed.
5. Let cool slightly. Slice and serve!

How to Reheat Baked Oatmeal Leftovers

Baked Oatmeal is great for meal prep / leftovers, but it does dry out after the first day of serving. Drizzle it with some milk or water before reheating in the microwave. You can also drizzle it with honey or maple syrup after reheating. Or serve it with a spoonful of yogurt. 

Another tip I have is that I store individual portions of the oatmeal in these Rubbermaid Brilliance containers (I have a bunch of these in different sizes that I purchased myself). The lids are designed for microwave use and they keep moisture in while reheating rather than drying food out. 

Variations on Baked Oatmeal

• Apple Cinnamon – Add chopped fresh apples instead of blueberries.
• Mixed Berry – Use a variety of fresh or frozen berries.
• Peanut Butter Banana – Add peanut butter (powdered peanut butter works great too) and chopped bananas.
• Chocolate Coconut – Stir in chocolate chips and shredded coconut.

More Recipes with Oatmeal

• Homemade Instant Oatmeal
• Brown Sugar Oatmeal Cookie Cups
• Oatmeal Latte
• Mason Jar Overnight Oats {Meal Prep}

Favorite Tools

• Whisk 
• Anchor 3-Piece Glass Mixing Bowls 
• Staub 9-inch Oval Baker

4.80 from 5 votes

Baked Blueberry Oatmeal

Baked oatmeal takes just a few minutes to mix up and then the oven does the rest of the work. It's great for make-ahead / meal prep breakfasts or for serving a crowd.

Prep: 10 minutes mins

Cook: 45 minutes mins

Total: 35 minutes mins

Servings: 8

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Equipment

• Mixing Bowl
• Whisk
• Baking Dish

Ingredients 

1x2x3x

• ▢ 2 Eggs
• ▢ 2 cups Milk (see note)
• ▢ 1/3 cup lightly packed Brown Sugar (substitute honey or maple syrup)
• ▢ 1 tsp Ground Cinnamon
• ▢ 1 tsp Baking Powder
• ▢ 1 tsp Pure Vanilla Extract
• ▢ 2 1/2 cups Rolled Oats (sometimes labeled "Old-Fashioned Oats; do not use Instant or Quick-Cook Oats")
• ▢ 2 cups Blueberries, fresh or frozen
• ▢ 1/2 cup Pecans, roughly chopped (optional)
• ▢ Maple syrup or honey (optional, for serving)

Instructions 

• Preheat oven to 350°F / 177°C. Spray an 8x8 baking dish (or similar-sized baking dish) with nonstick cooking spray or rub with some oil.
• In a mixing bowl, whisk eggs together. Whisk in milk, brown sugar, cinnamon, baking powder, and vanilla.
• Add oats, blueberries, and pecans to prepared baking dish. (Reserve some of the blueberries and pecans if you'd like to sprinkle them on top.)
• Pour liquids over oats and gently stir everything together in the pan just to encorporate them. Cover the pan tightly with foil.
• Bake oatmeal until firm in the middle, 35 to 40 minutes.
• Let oatmeal cool slightly before serving (it will continue to firm up as it rests). Serve with some maple syrup or honey drizzled over top.

Notes

Milk - Any type of milk will work in this recipe (almond, cow's milk, coconut, or oat milk). Apple juice works well too.

Meal Prep - If making the oatmeal ahead to serve throughout the week, let it cool completely before slicing into individual portions. To reheat, drizzle with some milk or water (to rehydrate) and warm it in the microwave. 

Nutrition

Calories: 242kcal | Carbohydrates: 36g | Protein: 8g | Fat: 8g | Saturated Fat: 2g | Cholesterol: 46mg | Sodium: 48mg | Potassium: 319mg | Fiber: 4g | Sugar: 16g | Vitamin A: 140IU | Vitamin C: 4mg | Calcium: 138mg | Iron: 2mg

Nutrition information is automatically calculated, so should only be used as an approximation.

Author: Jess Smith via Inquiring Chef

Cost: $5

Calories: 242

Keyword: baked oatmeal, easy breakfast recipe, oatmeal

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