The water will break down the chemicals in the baking powder, releasing CO2 (carbon dioxide) which will cause fizzing bubbles. If the baking powder is old, it may have already started to break down so there won't be much fizzing. In fact, putting a bit of baking powder into water is a good way to test if the batch is still usable.
Answers
September 12, 2010
The water will break down the chemicals in the baking powder, releasing CO2 (carbon dioxide) which will cause fizzing bubbles. If the baking powder is old, it may have already started to break down so there won't be much fizzing. In fact, putting a bit of baking powder into water is a good way to test if the batch is still usable.