Good-Cooking - The Best Blueberry Muffins

Ingredients

• 1/2 cup (1 stick) butter, at room temperature
• 1 cup granulated sugar (the author says to use slightly less if berries are very sweet)
• 2 large eggs, at room temperature
• 2 teaspoons baking powder
• 1 teaspoon vanilla extract
• 1/4 teaspoon salt
• 2 1/2 cups fresh blueberries (mash 1/2 cup with fork)
• 2 cups all-purpose flour
• 1/2 cup milk
• 1 tablespoon granulated sugar mixed with 1/4 teaspoon ground nutmeg