In bowl one: mix the sugar with the butter. Add the eggs and vanilla and mix it up again.
In bowl two: sieve the flour, cacao powder, baking powder and the salt.
In a small bowl: add the buttermilk and the red food colouring together. In case it isn’t red enough, just add some more drops of colour.
Now you are going to make the real batter. Make sure all three the bowls are within arms reach.
Start with bowl one, add 1/3rd of the flour mixture and mix it together. Add 1/3rd of the red buttermilk and mix it again. Repeat this in thirds until everything is mixed evenly in your basis bowl.
In a small separate bowl, add the vinegar and baking soda. As soon as it starts to foam, add it through the batter.
To bake both the layers, I’ve used two baking tins from 24 cm. In case you only have one, just first bake the first half of the batter and after it has completely dried, bake the second half.Grease your baking tin(s) with butter and cover the bottom with parchment paper. Take half of your batter and bake it in 25 minuten on 180°C.