Blueberry Baked Oatmeal (Cozy Make-Ahead Breakfast)

Blueberry baked oatmeal is like a cross between oatmeal and a warm coffee cake — soft and custardy in the middle, lightly crisp on top, and bursting with juicy blueberries. It is wholesome, naturally sweetened, and feeds a family.

Make it on the weekend and reheat slices all week for an easy, comforting breakfast.

Why you’ll love this blueberry baked oatmeal

• Make-ahead: bake once, enjoy all week.
• Family-sized: one pan feeds six.
• Wholesome: oats, fruit, and just a little sweetener.
• Cozy and comforting: tastes like a treat.

Ingredients you’ll need

Fresh or frozen blueberries both work; do not thaw frozen ones first.

• 2 cups rolled oats
• 1 teaspoon baking powder
• 1 teaspoon cinnamon
• 1/4 teaspoon salt
• 2 cups milk of choice
• 1/3 cup maple syrup
• 1 egg
• 2 tablespoons melted butter
• 1 teaspoon vanilla extract
• 1.5 cups blueberries

How to make blueberry baked oatmeal (step by step)

1. Preheat the oven to 375°F (190°C) and grease an 8×8-inch baking dish.
2. In a bowl, stir together the oats, baking powder, cinnamon, and salt.
3. In another bowl, whisk the milk, maple syrup, egg, melted butter, and vanilla.
4. Combine the wet and dry ingredients, then gently fold in most of the blueberries. Pour into the dish and scatter the remaining berries on top.
5. Bake for 32-35 minutes, until set and golden. Let cool slightly, then serve warm.

Tips for the best results

• Do not thaw frozen berries — add them frozen to avoid a purple batter.
• Let it rest a few minutes after baking so it sets.
• Add a splash of milk when serving for a creamier bite.

Variations & substitutions

• Swap blueberries for raspberries, diced apple, or peaches.
• Add chopped nuts for crunch.
• Stir in a scoop of protein powder with the dry ingredients.

Storage & make-ahead

Refrigerate for up to 5 days or freeze individual squares for up to 2 months. Reheat in the microwave with a splash of milk.

Frequently asked questions

Can I use frozen blueberries?

Yes. Add them frozen straight to the batter; thawing first can turn everything purple and mushy.

Is baked oatmeal healthy?

Yes. It is made with whole oats, fruit, and a modest amount of maple syrup, making it a wholesome, filling breakfast.

Can I make it dairy-free?

Yes. Use any plant-based milk and swap the butter for coconut oil.

How do I store baked oatmeal?

Keep it covered in the fridge for up to 5 days, or freeze squares. Reheat with a splash of milk to keep it moist.