Step 1

Preheat oven to 350 degrees. Line 24 muffin tins with cupcake papers.

Step 2

Sift together the cake flour, baking powder, and salt into a medium bowl; set aside. In a small bowl, mix food coloring and cocoa powder to form a thin paste without lumps; set aside.

Step 3

In a large bowl, using a hand mixer or stand mixer, beat butter and sugar together until light and fluffy, about three minutes. Beat in eggs, one at a time, then beat in vanilla and the red cocoa paste, scraping down the bowl with a spatula as you go. Add one third of the flour mixture to the butter mixture, beat well, then beat in half of the buttermilk. Beat in another third of flour mixture, then second half of buttermilk. End with the last third of the flour mixture, beat until well combined, making sure to scrape down the bowl with a spatula.

Step 4

In a small bowl, mix vinegar and baking soda. (Yes, it will fizz!) Add vinegar mixture to the cake batter and stir well to combine. Fill cupcake cups with cake batter until they are about 3/4 full. (I like to use an ice-cream scoop for this!) Bake for approximately 20-22 minutes, rotating pans halfway through. Cupcakes are done when a toothpick inserted in the center comes out clean. Check early and don’t overbake!

Step 5

Cool the cupcakes in their tins on a wire rack for 10 minutes then remove and allow to cool completely before frosting.

Step 6

To make the frosting, in the bowl of a stand mixer fitted with the paddle attachment beat the cream cheese and butter on medium-high speed until well combined and smooth, about 2-3 minutes. Mix in the vanilla extract. Gradually beat in the powdered sugar until totally incorporated, increase the speed and then beat until smooth. Frost cooled cupcakes as desired.