Bicarbonate of soda is available in the home baking sections of supermarkets. Bicarbonate of soda was once used in to soften the skins of pulses while cooking, it was also added to green ...
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.