Sweet Potato Pie Cupcakes - Cupcake Fanatic

Ingredients

• 2 tablespoons unsalted butter, melted
• 1/2 cup graham cracker crumbs
• 1/2 teaspoon sugar
• 1 1/3 cups loosely packed brown sugar
• 1 large egg
• 2 teaspoons vanilla extract
• 1/2 cup unsalted butter, melted and cooled
• 6 ounces cooked, mashed sweet potato
• 1 1/4 cups all-purpose flour
• 1 1/4 teaspoons baking soda
• 1/4 teaspoon salt
• 1/2 teaspoon cinnamon
• 1/4 teaspoon nutmeg
• 1/2 cup milk
• 1/2 cup butter (1 stick), softened
• 1 tablespoon vanilla extract
• 1 1/2 cups marshmallow fluff
• 3 cups of powdered sugar