0.45cupsour cream or plain Greek yogurtroom temperature
0.67cupbuttermilkroom temperature
1.6cupfresh blueberriespat dry if rinsed
1tbspall-purpose flourfor tossing berries
0.75cupconfectioners' sugarfor lemon glaze
1.5tbspfresh lemon juicefor lemon glaze
Instructions
Preparation Steps
Heat oven to 350°F. Grease and line an 8-inch square pan with parchment.
Toss blueberries with 1 tbsp flour in a small bowl; set aside.
Whisk 1.9 cups flour, baking powder, and salt in a medium bowl.
Beat butter, sugar, and lemon zest until pale and fluffy, about 2 minutes.
Blend in eggs one at a time. Mix in vanilla, sour cream, and lemon juice.
Stir in dry ingredients alternately with buttermilk, beginning and ending with dry mix.
Fold in floured blueberries gently to avoid streaking.
Spread batter in pan. Bake until golden and a tester comes out clean, about 33–38 minutes.
Cool in pan 15 minutes. Lift out to a rack to finish cooling.
Whisk confectioners' sugar with lemon juice until smooth. Drizzle over cooled cake, then slice.
Notes
Try adding 1 tbsp poppy seeds to the batter or swap half the blueberries with raspberries. For extra zing, brush the warm cake with 1 tbsp lemon juice before glazing. Store covered at room temperature for 2 days or refrigerate up to 5 days; freeze slices well-wrapped for 2 months.This recipe is an original creation inspired by classic Lemon Blueberry Breakfast Cake Recipes flavors. All ingredient ratios and instructions are independently developed.