Raising Agents

© PDST Home Economics

What is a Raising Agent?What is a Raising Agent?

A raising agent is something that makesbread and other foods rise.

There are 4 different raising agents;

1.1. AAir

2.2. BBread Soda

3.3. BBaking Powder

4.4. YYeast

THINK ABBY!!!!

1. Air

• In all baked foods, it is important to get lots of air into the mixture

• Air expands when heated and makes the food light

• Air is introduced into a mixture by; 1. Sieving the flour 2. Rubbing fat into flour, high over the bowl 3. Creaming/beating fat and sugar 4. Whisking eggs and sugar

Chemical Raising Agents

Bread Soda Baking Powder

Equation to show how Chemical Raising Agents Work!!!!

Alkali + Acid = Carbon DioxideAlkali + Acid = Carbon Dioxide

Carbon Dioxide

Carbon Dioxide

HEAT

HOW CARBON DIOXIDE WORKS???

2. Bread Soda

• Bread soda is alkali • When mixed with buttermilk (acid) and a liquid it

makes CARBON DIOXIDE • The CARBON DIOXIDE expands and rises when

heated, raising the dough

3. Baking Powder

• Baking powder is a mixture of bread soda and an acid

• When moistened by eggs or milk CARBON DIOXIDE is produced

• The CARBON DIOXIDE expands and rises when heated, raising the dough

4. Yeast

• Yeast is a micro organism • It produces CARBON DIOXIDE in the dough • The CARBON DIOXIDE expands and rises when

heated, raising the dough• Used in commercial breads

When making queen cakes what raising agents are used????

What happens when queen

cakes are placed in oven???

Result??