Lemon Blueberry Baked Oatmeal (Printable)

A warm, comforting breakfast with hearty oats, fresh blueberries, and bright lemon flavor baked to golden perfection.

# What You Need:

→ Dry Ingredients

01 - 2 cups old-fashioned rolled oats
02 - 1/2 cup chopped walnuts or almonds (optional)
03 - 1 teaspoon baking powder
04 - 1/2 teaspoon ground cinnamon
05 - 1/2 teaspoon salt

→ Wet Ingredients

06 - 2 cups milk (dairy or plant-based)
07 - 1/4 cup maple syrup or honey
08 - 2 large eggs
09 - 1/4 cup unsalted butter, melted (or coconut oil)
10 - 1 tablespoon lemon zest (from about 1 large lemon)
11 - 1 teaspoon pure vanilla extract
12 - 2 tablespoons fresh lemon juice

→ Add-ins

13 - 1 1/2 cups fresh or frozen blueberries (do not thaw if frozen)

→ Topping

14 - 2 tablespoons coconut sugar or brown sugar (optional)

# How-To Steps:

01 - Preheat the oven to 350°F. Lightly grease a 9x9-inch baking dish with cooking spray or butter.
02 - In a large bowl, combine rolled oats, nuts (if using), baking powder, cinnamon, and salt. Mix well to distribute evenly.
03 - In a separate bowl, whisk together milk, maple syrup, eggs, melted butter, lemon zest, vanilla extract, and lemon juice until fully blended and smooth.
04 - Pour the wet ingredients into the dry ingredients. Stir gently until just combined, being careful not to overmix.
05 - Gently fold in the blueberries, distributing them evenly throughout the batter.
06 - Transfer the mixture to the prepared baking dish and spread evenly. Sprinkle with coconut sugar or brown sugar if desired.
07 - Bake for 35 minutes, or until the top is golden brown and the oatmeal is set (a toothpick inserted in the center should come out clean).
08 - Allow to cool for 5 minutes before serving. Serve warm, with extra milk or yogurt if desired.

# Expert Tips:

01 -
  • The lemon zest makes the whole kitchen smell like sunshine while it bakes
  • It reheats beautifully so busy mornings get a head start
  • My kids actually fought over the last piece
02 -
  • Overmixing makes the texture gummy so stop as soon as ingredients are combined
  • Frozen blueberries bleed more color but taste just as delicious
03 -
  • Use a microplane for the finest lemon zest without any bitter pith
  • Let the baked oatmeal cool completely before covering to prevent condensation

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