Zig-Zag Toast Pennsylvania Academic Standards: Science and Technology 3.4.4 A Before you paint the Zig Zag stripes onto your bread, take a close look at it. What do you see? ---Holes and lots of them. Have you ever wondered why there are so many holes in bread? Try making a batch of rolls for yourself (have an adult help you with the oven) to see why bread is so full of holes! You will need: Yeast Warm water Sugar Flour Or a box of bread mix Experiment: Follow the directions on the back of the yeast packet, or use a box of bread mix. When you have mixed all of the ingredients together, cut through the dough carefully and take a look. You should see little bubbles forming in the dough. Shape the dough into little rolls and let it rise according to the directions. Did your rolls almost double in size? Carefully cut through one of the rolls. It should be full of air bubbles. Cook the rolls. When they are cool. Open up a roll, when the dough cooked it set around the bubbles so that they do not collapse or escape. Enjoy your rolls! Yummy! What happened? The yeast in the recipe is really a fungus. It changed the sugar in the dough to alcohol and a gas called carbon dioxide. The bubbles in the rolls are full of the carbon dioxide gas, they help make the rolls expand or rise. When the rolls are baked in the hot oven, the alcohol evaporates and the dough sets around the gas bubbles. You are left with fluffy, tasty rolls! Information adapted from: Munch! Crunch! What's for Lunch? By Janice Lobb, copyright date 2000, published by Snapdragon Publishing Ltd.
Alphabet Kitchen is an original production of WQLN TV-54, Erie Pennsylvania. © 2006 WQLN Productions Funding provided by The Erie County Department of Health & The Pennsylvania Department of Health