Blueberry Muffins

Ingredients

• ½ cup unsalted butter
• 1 ¼ cups sugar
• 2 eggs
• 2 cups 1% milk
• 2 cups all-purpose flour
• 2 teaspoons baking powder
• ½ teaspoon salt
• 2 ½ cups fresh blueberries
• 2 teaspoons sugar (for topping)