Preheat the oven to 350°F (175°C). Grease the sides and bottom of a loaf pan, ensuring even coverage.
Combine Dry Ingredients
In a medium bowl, sift together the flour (1 ½ cups), baking powder, and salt. Set aside.
Mix Wet Ingredients
In a large mixing bowl, whisk together the eggs, granulated sugar, yogurt (or sour cream), vegetable oil, vanilla extract, and lemon zest until smooth and well blended.
Incorporate Dry Ingredients
Gradually add the dry mixture to the wet ingredients, stirring gently until just combined. Avoid overmixing to maintain a tender crumb.
Add Blueberries
In a small bowl, toss the blueberries with the reserved 1 tablespoon of flour to prevent sinking. Fold the coated blueberries gently into the batter.
Bake the Bread
Pour the batter into the prepared loaf pan and smooth the top. Bake for 50 to 55 minutes, or until a toothpick inserted into the center comes out clean or with only a few moist crumbs.
Cool the Loaf
Allow the bread to cool in the pan for 10 minutes, then carefully transfer it to a wire rack to cool completely.
Prepare the Lemon Glaze
In a small saucepan over low heat, whisk together the lemon juice and sifted confectioners’ sugar until dissolved and smooth. Simmer gently for 3 minutes.
Glaze the Bread
Using a toothpick, poke small holes across the top and sides of the cooled loaf. Brush the lemon glaze evenly over the bread. Allow the glaze to set for approximately 15 minutes before slicing and serving.
Notes
To prepare a gluten-free version of Lemon Blueberry Bread, substitute the all-purpose flour with a 1:1 gluten-free baking blend. Ensure the baking powder and confectioners’ sugar are certified gluten-free.