Lucky's Golden Ticket Cupcakes

Bahan-bahan (24 porsi)

• 1 1/2 sticks (3/4 cup) salted butter, at room temperature
• 1 cup granulated sugar
• 2 1/2 cups all purpose flour
• 1 1/2 teaspoons baking powder
• 1/4 teaspoon baking soda
• 1 teaspoon kosher salt
• 3 large eggs
• 1 cup milk, warmed
• 1 tablespoon vanilla extract
• 1/2 cup sour cream or Greek yogurt
• 2 sticks (1 cup) salted butter, at room temperature
• 1 cup packed dark brown sugar
• 1/2 cup heavy cream
• 2 -3 cups powdered sugar
• 1 tablespoon vanilla extract
• Lucky Charm marshmallows, for decorating
• edible gold leaf sheets, for decorating