You can make your own baking powder by combining 15ml/1tbsp bicarbonate of soda with 30ml/2tbsp cream of tartar. Measure carefully as too much or too little can upset a recipe’s balance.
Place flour, oil, cream of tartar and salt in bowl. Boil the water. Add food colouring to the water. Then gradually add the coloured water to the dry ingredients, stirring as you go, until it thickens ...