Mix the flour, sugar, butter, eggs, vanilla sugar, baking powder and sour cream with the mixer and divide the dough into three portions. Mix one dough with red grits powder, one with the powder for green jelly and one with baking cocoa.
Pour a tablespoon of each dough into the hollows of the muffin tray and bake the muffins at 180 degrees for about 20 minutes. After baking, dust with powdered sugar if you like.