Preheat oven to 325°F. Butter a 8x4” or 9x5” loaf pan, either works great.
In a small mixing bowl combine flour, baking powder, baking soda, salt, mix until ingredients are combined and set aside.
In a large mixing bowl cream sugar with butter with your electric mixer. Gradually add in eggs one at a time. Add milk, vanilla extract, and lemon zest, mixing until well incorporated. Slowly add dry ingredients, and mix until smooth. Gently fold in blueberries with a spatula, and transfer to butter loaf pan.
Bake at 325°F degrees for 1 hour 15 minutes or until set, check with a toothpick. Cool for 20 minutes before turning out to a wire rack. Cool completely before adding glaze.