Preheat oven to 350F and line a loaf pan with parchment paper
Zest a lemon and then squeeze the lemon juice out.
Mix the lemon zest and 2 tbsp of the lemon juice with the sour cream, eggs, vegetable oil, vanilla extract and granulated sugar in a large mixing bowl. Whisk together until smooth.
In a separate bowl combine the all purpose flour, baking soda, baking powder and salt. Fold the dry ingredients into the wet using a flat spatula.
Wet the blueberries until just damp and them toss in a tsp of all purpose flour. Coating the blueberries in flour prevents them from sinking to the bottom of the loaf.
Fold coated blueberries into the batter and pour the batter into the loaf pan.
Bake at 350F for 40 minutes. Remove from the oven and allow to cool completely.
While the loaf cools, prepare lemon glaze by mixing together all of the glaze ingredients until smooth.
Pour glaze over the cooled loaf, slice and enjoy.
Notes
Make this loaf gluten free by using an all purpose gluten free flour blend
You can use raspberries or blackberries in place of the blueberries