Blueberry Upside-Down Cake Recipe: How to Make It

Ingredients

• 6 tablespoons butter, softened, divided
• 1/4 cup packed brown sugar
• 2 cups fresh blueberries
• 3/4 cup sugar
• 1 large egg, room temperature
• 1 teaspoon vanilla extract
• 1-1/4 cups cake flour
• 1-1/2 teaspoons baking powder
• 1/2 cup 2% milk
• Whipped topping, optional