Hint: the answer is crystal clear. Water crystals are polymer-based crystals that absorb and slowly release water, acting like tiny sponges in the soil. They’re especially useful in containers, raised ...

A cake that won't rise, flat muffins or brioche dough that won't rise... Sound familiar? If so, you're not alone. And often, the culprit hides in a discreet little sachet at the back of the cupboard: ...