Blueberry Crumb Muffins

Preheat oven to 375°F.

Mix flour, sugar, baking powder, and salt.

Whisk milk, egg, and melted butter.

Combine wet and dry ingredients gently.

Fold in blueberries.

Spoon batter into muffin cups.

Sprinkle brown sugar on top.

Bake until golden and set.

Cool slightly before serving.

Enjoy warm.