1. Raising Agents
© PDST Home Economics

2. What is a Raising Agent?
A raising agent is something that makes
bread and other foods rise.

3. There are 4 different raising agents;
1. Air
2. Bread Soda
3. Baking Powder
4. Yeast
THINK
ABBY!!!!

4. 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

5. • 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

6. Chemical Raising Agents
Bread Soda Baking Powder
Equation to show how Chemical Raising Agents Work!!!!
Alkali + Acid = Carbon Dioxide

7. Carbon Dioxide
Carbon Dioxide
HEAT
HOW CARBON DIOXIDE WORKS???

8. 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

9. 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

10. 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

11. When making
queen cakes what
raising agents are
used????
What happens
when queen
cakes are placed
in oven???
Result??