Step 1

Preheat oven to 350 degrees F and line 24 muffin tins with paper liners. In a mixing bowl, combine flour, corn starch, cocoa powder, baking powder, baking soda, and salt.

Step 2

In the bowl of a standing electric mixer, beat butter and sugar until light and creamy. Add in the eggs one at a time, beating to incorporate each. Mix in the sour cream, vanilla, and food coloring. Mix in the flour until just combined, scraping the sides of the bowl as needed.

Step 3

Spoon batter into cupcake liners and bake for 15-18 minutes or until toothpick comes out with only a few crumbs or clean. Cool completely before adding frosting.

Step 4

Cream the butter and cream cheese together until smooth. Mix in the sugar and then the cream and vanilla. Place frosting in a piping bag fitted with a star tip (1M) and pipe onto cupcakes. Add sprinkles and top with a chocolate coin.