Preheat the oven to 350℉ (175℃) line a 12-cup cupcake pan with cupcakes liners.
In a bowl combine & mix room-temperature milk, vinegar & yogurt. Let it sit for 5 min until it is slightly curdled to make buttermilk.
Add sugar, oil & vanilla. Mix with a hand whisk until sugar granules are dissolved and oil is combined.
Combine and sift all the dry ingredients (flour, cocoa, baking powder, baking soda) into liquid ingredients. Add the red color to the batter based on your liking. Mix gently with a hand whisk or electric whisk until the batter is smooth.
Fill 12 cupcake liners with the cupcake batter and bake for 13-15 minutes or until firm to touch.
Let them cool completely.
Trim a very thin layer of the cupcake if desired to make cake crumbs for decorating.