YEAST BREADS

LEAVENING AGENTSMakes a baked product rise.

1. Air- Air is created by sifting, creaming together sugar & fat, whipping.

2. Steam

3. Baking powder

4. Baking soda

5. Yeast

LEAVENING AGENTSMakes a baked product rise.

• What is the difference between baking soda and baking powder?– Baking soda is pure sodium bicarbonate.

When baking soda is combined with moisture and an acidic ingredient, the resulting chemical reaction produces bubbles of carbon dioxide that expand under oven temperatures, causing the baked good to rise.

– Baking powder contains sodium bicarbonate, but it includes the acidifying agent already (cream of tartar).

YEAST BREADS• Yeast breads use YEAST as

a leavening agent.• Yeast needs warmth, food

and moisture to grow.• Small amounts of sugar

speeds the activity of yeast. (too much sugar will inhibit yeast activity)

• Salt inhibits the speed of yeast activity.

YEAST BREADS

Temperature and yeast

• 50 degrees- yeast begins to activate

• 78-82 degrees- yeast produces the most gas

• 120 degrees- yeast begins to die

• 143 degrees- yeast is useless for baking.

YEAST BREADS

KNEADING DOUGH• Kneading dough develops gluten to give

the dough shape.• Gluten- a protein in flour. • If you stir wet flour mixture a little, gluten

develops a little and bread is tender.• If you stir (knead) wet flour mixture a lot,

gluten develops a lot and the bread is tough.– You only want to stir/mix quick breads a little to

form a small amount of gluten– You want to stir/mix (knead) yeast breads a lot to

form a large amount of gluten.

YEAST BREADS

• You may knead bread by hand or with your dough hook on the electric mixer.

• Kneading dough by hand:– Fold– Push– Turn– Repeat

YEAST BREAD BAKING BASICS DVD QUESTIONS

• Why is it important for the water to be the correct temperature to mix yeast?

• What do fats do in yeast breads?• Name 2 types of flour available for making

bread?• What does kneading do for the bread?• How can you tell if you have kneaded

bread long enough?• What purpose does sugar serve to yeast

bread?

YEAST BREAD BAKING BASICS DVD ANSWERS

• Why is it important for the water to be the correct temperature to mix yeast?- Yeast is a living organism and if the water is too hot

it will kill the yeast and the dough will not rise.

•What do fats do in yeast breads?- Fats make breads soft and tender.

• Name 2 types of flour available for making bread?

– Rye, soy, whole wheat, rice, all-purpose, bread flour.

– It forms gluten. It makes the dough smooth and elastic.

- When an indentation in the center of the bread stays in place.

• How can you tell if you have kneaded bread long enough?

•What does kneading do for the bread?

• What purpose does sugar serve to yeast bread?

- Sugar acts as food for the yeast.