Preheat your oven to 350°F (175°C). Grease a loaf pan and set aside.
In a mixing bowl, whisk together the flour, sugar, baking powder, and salt.
In another bowl, whisk together the melted butter, eggs, vanilla extract, and milk.
Pour the wet ingredients into the dry ingredients and stir until just combined. Do not overmix.
Gently fold in the blueberries.
Pour the batter into the prepared loaf pan and spread it evenly.
Bake for 50-60 minutes, or until a toothpick inserted into the center comes out clean.
Let the bread cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.