Easy Blueberry Muffins with Frozen Berries

Ingredients

• 4 cups all-purpose flour
• 4 teaspoons baking powder
• 1/2 teaspoon salt
• 1 cup butter, softened
• 2 cups sugar
• 4 large eggs, room temperature
• 1 cup 2% milk
• 2 teaspoons vanilla extract
• 2 cups frozen unsweetened blueberries
• TOPPING:
• 2 tablespoons sugar
• 1/2 teaspoon ground nutmeg