Cookery book

A savoury onion and potato sauce or soup from Cosenza in Calabria. If the soup, it is made with hot red peppers, potatoes and Parmesan cheese. It is also more prosaically known as brodetto vegetale.

To leaven. To add a raising agent. To raise, of bread.

Leavened, as in leavened bread.

The starter for bread. Breads that are made with this type of starter.

Yeast. Leavening.

Yeast obtained from beer. Baker's yeast.

Baking powder. A raising agent used to make a baked mixture light. Baking powder consists of bicarbonate of soda (US: baking soda) and cream of tartar which, if mixed with flour or starch, assists pastry and cake doughs to rise, as when it meets moisture it produces carbon dioxide which aerates and lightens the dough.

Yeast obtained from beer. Sourdough starter, known as "chef" by the French.