Ingredients: Gather all-purpose flour, blueberries (fresh or frozen), sugar, butter, eggs, baking powder, milk, and vanilla extract.
Preparation: Preheat the oven and grease a baking pan. If using frozen blueberries, thaw and pat them dry.
Mix Dry Ingredients: In a bowl, whisk together flour and baking powder.
Cream Butter and Sugar: Beat softened butter and sugar until creamy in a separate bowl.
Combine Wet Ingredients: Add eggs one at a time to the butter mixture, then mix in milk and vanilla extract.
Mix: Gradually add the dry ingredients to the wet mixture, stirring until just combined. Gently fold in the blueberries.
Bake: Pour the batter into the prepared pan and spread evenly. Bake until golden brown and a toothpick inserted into the center comes out clean.