Preheat the oven to 170°C (325°F)
Beat sugar and butter till its light and fluffy. Add the eggs one at a time. In an extra bowl mix the dry ingredients (without the cocoa) together and stift. To the egg-sugar mixture now add the dry ingredients and the milk alternatelly. Now take a third of the dough (1/3) and place in a seperate bowl - to that third you add the 2 teaspoons of stiftet cocoa powder and mix well.