Add flour, cocoa powder, baking soda and salt, stir and set aside.

Mix butter and sugar, add eggs and whisk.

Add oil, vinegar and vanilla extract, mix well.

Add buttermilk and whisk well.

Add the dry ingredients gradually and mix after each addition.

Add red food coloring and mix.

Scoop the batter into the cupcake liners, about ¾ of the way full. Bake at 175C for 20 minutes, until the toothpick inserted comes out clean.