Harry Potter Butterbeer Cake | Nerdy Nummies | Rosanna Pansino

Ingredients

• 2 ¾ cups all-purpose flour
• ¾ teaspoon baking powder
• ¾ teaspoon baking soda
• 1 ½ teaspoons salt
• 1 cup unsalted butter
• 1 ¾ cups dark brown sugar
• 3 eggs
• 2 teaspoons vanilla extract
• 1 ½ teaspoons butterscotch flavor
• 1 cup buttermilk
• 1 cup sugar
• 5 egg whites
• 1 pound butter, cubed & at room temperature
• 1 teaspoon salt
• 1 ½ teaspoons cream soda flavor
• ½ teaspoon vanilla extract