2 cups flour
1 tablespoon baking powder
1/2 teaspoon salt
1/2 cup sugar
1 egg, slightly beaten
1 cup milk
1/4 cup melted & browned butter, cooled
1/2 cup blueberries
1/2 cup blackberries (reserve one blackberry for icing)
1 cup powdered sugar + 1 tablespoon milk for icing
Preheat the oven to 375°F. Butter muffin pans. Mix the flour, baking powder, salt, and sugar in a large bowl. Add the egg, milk, and butter, stirring only enough to dampen the flour; the batter should not be smooth. Fold in berries. Spoon into the muffin pans, filling each cup about two-thirds full. Bake for about 20 to 25 minutes each.
Mash blackberry and milk together. Add powdered sugar and whisk well until smooth. drizzle on muffins.