Mix all dry ingredients together (except cocoa).
Add liquid ingredients and mix.
Split the mixture in half.
Add 10g cocoa powder to one half & 10g more flour to the other half.
Pour both mixtures in the baking dish.
Bake at 180 degrees for about 40 minutes. Check with a toothpick.

220g flour
200g sugar
1 teaspoon bicarbonate of soda
1 pinch of salt
240ml plant based milk
2 teaspoon vanilla
80ml oil
1 tablespoon vinegar
10g cocoa powder