Yeast BreadsYeast Breads

Yeast ExperimentYeast Experiment

The purpose of any leavening agent is to produce the gas that makes The purpose of any leavening agent is to produce the gas that makes bread rise. Yeast does this by feeding on the sugars in flour, and bread rise. Yeast does this by feeding on the sugars in flour, and expelling carbon dioxide in the process.expelling carbon dioxide in the process.

Make a yeast-air balloon to get a better idea of what yeast can do.Make a yeast-air balloon to get a better idea of what yeast can do.

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1 packet of active dry yeast1 packet of active dry yeast 1 cup 1 cup very warm very warm water (105° F–115° F)water (105° F–115° F) 2 tablespoons 2 tablespoons sugarsugar

ExperimentExperiment • • Pour the mixture into an empty Pour the mixture into an empty

bottle and attach a balloon to the bottle and attach a balloon to the top.top.

What do you predict will happen over What do you predict will happen over time?time?

What is happening in this What is happening in this experiment?experiment?

As the yeast feeds on the sugar, it As the yeast feeds on the sugar, it produces carbon dioxide. With no place produces carbon dioxide. With no place to go but up, this gas slowly fills the to go but up, this gas slowly fills the balloon.balloon.

A very similar process happens as bread A very similar process happens as bread rises. Carbon dioxide from yeast fills rises. Carbon dioxide from yeast fills thousands of balloon-like bubbles in the thousands of balloon-like bubbles in the dough. Once the bread has baked, this is dough. Once the bread has baked, this is what gives the loaf its airy texture.what gives the loaf its airy texture.

How to Knead DoughHow to Knead Dough

http://www.youtube.com/watch?http://www.youtube.com/watch?v=qVewUbE2YOM&feature=player_ev=qVewUbE2YOM&feature=player_embeddedmbedded

How to Roll a pretzelHow to Roll a pretzel

http://www.youtube.com/watch?http://www.youtube.com/watch?v=PpOfYie-JeUv=PpOfYie-JeU

What is Yeast?What is Yeast?

A microscopic plant used A microscopic plant used as a leavening agentas a leavening agent

FermentationFermentationProcess of Process of

yeast yeast changing changing sugar into sugar into carbon carbon dioxide and dioxide and ethyl alcoholethyl alcohol

Purpose of yeastPurpose of yeast

Makes bread Makes bread riseriseActs as a leavening agentActs as a leavening agentProofingProofing=dough rising as =dough rising as carbon dioxide is produced carbon dioxide is produced during fermentationduring fermentation

Purpose of YeastPurpose of Yeast

Yeast is a Yeast is a microorganism that microorganism that produces produces carbon carbon dioxidedioxide

Requirements for Yeast to Requirements for Yeast to GrowGrowFood Food

(Ex: sugar and flour)(Ex: sugar and flour)LiquidLiquid

(Ex: water or milk)(Ex: water or milk)Warm TemperatureWarm Temperature

(Not too hot though or it (Not too hot though or it will kill the yeast)will kill the yeast)

Cooking with YeastCooking with YeastBe sure it is fresh or it will Be sure it is fresh or it will work work

slowerslower It should be dissolved in water or It should be dissolved in water or

milk that is milk that is lukewarmlukewarmThe lukewarm water can be no The lukewarm water can be no

warmer than warmer than 125 degree125 degree If yeast is dissolved in water that If yeast is dissolved in water that

is too hot, it will is too hot, it will killkill the yeast the yeast

Cooking with Yeast Cont.Cooking with Yeast Cont.

When cooking with yeast, When cooking with yeast, your other ingredients your other ingredients should be at should be at room room temperature temperature

Overall yeast breads take Overall yeast breads take longerlonger than quick breads to than quick breads to prepareprepare

Storing YeastStoring Yeast

Yeast should be stored in a Yeast should be stored in a cool, dry placecool, dry place

If yeast is stored too long or If yeast is stored too long or is approaching its expiration is approaching its expiration date, the yeast tends to date, the yeast tends to work work slowerslower than normal than normal

Storing Prepared Yeast Storing Prepared Yeast DoughDough

If yeast dough is stored in If yeast dough is stored in the refrigerator, the rising the refrigerator, the rising process will process will slow down.slow down.

If yeast dough is stored in If yeast dough is stored in the freezer, the rising the freezer, the rising process will process will stop.stop.

Watching the processWatching the process

http://www.exploratorium.edu/http://www.exploratorium.edu/cooking/bread/glutengood1test.htmlcooking/bread/glutengood1test.html

Making Yeast BreadMaking Yeast Bread

After kneading you have to let the After kneading you have to let the dough dough riserise..

Letting it rise allows yeast colonies Letting it rise allows yeast colonies to multiply and flavors to develop. to multiply and flavors to develop.

For the first rising, place ball-For the first rising, place ball-shaped dough in shaped dough in greasedgreased, large , large bowl that is bowl that is coveredcovered..

Place it in a Place it in a warmwarm place. place.

Making Yeast Bread Cont.Making Yeast Bread Cont.

Allow to sit 1-1 ½ hours; it should Allow to sit 1-1 ½ hours; it should double double in size.in size.

Poke it with two fingers and if indention Poke it with two fingers and if indention staysstays it is ready to be shaped. it is ready to be shaped.

Then dough must be Then dough must be punchedpunched down to down to allow excess gas to escape; this allow excess gas to escape; this literally means you punch the dough in literally means you punch the dough in the middle and pull dough away from the middle and pull dough away from the sides of the bowl and press it down the sides of the bowl and press it down toward the center.toward the center.

Making Yeast Bread Cont,Making Yeast Bread Cont,

ShapeShape the dough. the dough.Let it Let it riserise again until it again until it

doubles in size. The dough doubles in size. The dough should be covered while should be covered while rising. rising.

Then Then bakebake the dough in an the dough in an oven.oven.

Pretzel MakingPretzel Making

http://video.google.com/videoplay?http://video.google.com/videoplay?docid=-docid=-2184982200908302049&q=pretzel+2184982200908302049&q=pretzel+making+video&total=454&start=0&making+video&total=454&start=0&num=10&so=0&type=search&plindenum=10&so=0&type=search&plindex=1x=1