In a bowl mixed all the dry ingredients and keep aside, that's your flour, baking powder. In another bowl break your eggs, butter and sugar beat it very well. Add flavour and flour gradually. Divide the mixture into two, add cocoa powder to one mixture. Grease your baking pan with butter and add you mixture in layers. Bake in an oven for 25-30mins. Use a toothpick to know if it's fully done. You cut and serve. You can sprinkle some chocolates syrup also