Lemon Blueberry Coffee Cake (Printable)

Moist cake with blueberries, lemon, and a buttery crumb topping. Ideal for breakfast or a sweet treat.

# What You’ll Need:

→ For the Cake

01 - 2 cups all-purpose flour
02 - 1 cup granulated sugar
03 - 1/2 cup unsalted butter, softened
04 - 2 large eggs
05 - 1/2 cup whole milk
06 - 1/4 cup sour cream
07 - 2 teaspoons baking powder
08 - 1/2 teaspoon baking soda
09 - 1/4 teaspoon salt
10 - 2 teaspoons lemon zest (from 1 large lemon)
11 - 2 tablespoons lemon juice
12 - 1 1/2 cups fresh blueberries (or frozen, unthawed and tossed with 1 tablespoon flour)
13 - 1 teaspoon vanilla extract

→ For the Crumb Topping

14 - 1/2 cup all-purpose flour
15 - 1/3 cup light brown sugar, packed
16 - 1/4 cup unsalted butter, melted
17 - 1/2 teaspoon ground cinnamon
18 - Pinch of salt

→ For the Lemon Glaze (optional)

19 - 1/2 cup powdered sugar
20 - 1 to 2 tablespoons lemon juice

# How To Make It:

01 - Preheat your oven to 350°F. Thoroughly grease and lightly flour a 9-inch round or square baking pan.
02 - In a medium bowl, combine 1/2 cup all-purpose flour, 1/3 cup packed light brown sugar, 1/2 teaspoon ground cinnamon, and a pinch of salt. Pour in 1/4 cup melted unsalted butter and stir until moist, coarse crumbs form. Set this mixture aside.
03 - In a large mixing bowl, using an electric mixer, cream together 1/2 cup softened unsalted butter and 1 cup granulated sugar on medium speed until the mixture is light and fluffy, approximately 2 to 3 minutes.
04 - Gradually beat in the 2 large eggs, one at a time, ensuring each is fully incorporated before adding the next. Stir in 1 teaspoon vanilla extract, 2 teaspoons lemon zest, and 2 tablespoons lemon juice until well combined.
05 - In a separate bowl, whisk together 2 cups all-purpose flour, 2 teaspoons baking powder, 1/2 teaspoon baking soda, and 1/4 teaspoon salt.
06 - Add half of the dry flour mixture to the creamed butter mixture, mixing gently on low speed until just combined. Next, pour in 1/2 cup whole milk and 1/4 cup sour cream, blending until incorporated. Finally, add the remaining dry flour mixture, mixing only until no streaks of flour remain, being careful not to overmix.
07 - Using a spatula, gently fold 1 1/2 cups fresh blueberries into the batter. If utilizing frozen blueberries, ensure they are unthawed and lightly tossed with 1 tablespoon of flour before adding.
08 - Pour the prepared batter evenly into the greased and floured 9-inch baking pan. Distribute the reserved crumb topping uniformly over the batter.
09 - Bake for 40 to 45 minutes, or until a wooden skewer or toothpick inserted into the center of the cake comes out clean, indicating it is fully cooked.
10 - Allow the coffee cake to cool in the pan for 15 minutes. After this initial cooling, carefully transfer it to a wire rack to cool completely.
11 - For an optional glaze, in a small bowl, whisk together 1/2 cup powdered sugar with 1 to 2 tablespoons of lemon juice until smooth and pourable. Drizzle the glaze over the cooled coffee cake just before serving.

# Expert Advice:

01 -
  • It's truly the perfect balance of tart lemon and sweet blueberries, wrapped in the most tender cake you can imagine.
  • The crumb topping creates this delightful texture contrast, making every bite an absolute treat for your senses.
02 -
  • Never overmix your batter once the flour is added; it develops the gluten too much, leading to a tough cake instead of a tender one.
  • When using frozen blueberries, toss them lightly in a tablespoon of flour before adding to the batter; this helps prevent them from sinking to the bottom.
03 -
  • Ensure your butter is truly at room temperature for the cake batter; it creams with sugar much better, creating tiny air pockets for a lighter cake.
  • Don't open the oven door during the first 30 minutes of baking; temperature fluctuations can cause the cake to sink.