Prep the Oven & Pan:
Preheat oven to 350°F (175°C).
Grease and flour a 9×5-inch loaf pan or line with parchment paper.
Mix Dry Ingredients:
In a bowl, combine 1 ½ cups flour, baking powder, baking soda, and salt. Set aside.
Cream Butter & Sugar:
In a large bowl, beat softened butter and sugar until light and fluffy.
Add Eggs & Flavor:
Beat in eggs one at a time. Stir in vanilla extract and lemon zest.
Combine Wet & Dry Ingredients:
Mix in yogurt or sour cream. Gradually fold in the dry ingredients until just combined. Avoid overmixing.
Prepare Blueberries:
Toss blueberries with 2 tbsp flour to prevent them from sinking. Gently fold into the batter.
Bake:
Pour batter into the prepared loaf pan. Smooth the top.
Bake for 50–60 minutes or until a toothpick inserted in the center comes out clean.
Cool & Serve:
Let the loaf cool in the pan for 10 minutes, then transfer to a wire rack to cool completely. Slice and enjoy!
Serving and Storage Tips
