Science-Fair Success!

Although our first shot at a science-fair experiment was by no means a waste, we did have to redo the recipe with the correct proportions of ingredients. That meant we'd have to make more chocolate-chip cookies. (It's a tough job...)

The original cookie recipe came from My Kitchen Escapades. I cut the recipe in half, and we used baking powder in one batch and baking soda in the other. We used the same size cookie scoop, baked for the same amount of time, and measured the cookies after they baked and cooled.

Here's the recipe as Little Brother made it. Today, he had help from a friend who was visiting. I supervised and underwrote the cost of the ingredients. And I'm not letting him know that I'm reporting on his science-fair project here! He has to write his OWN report for school.

SAUCEPAN CHOCOLATE-CHIP COOKIES
(makes about 2 1/2 dozen)

1 stick butter, cut into 8 pieces
1/2 cup brown sugar
1/3 cup sugar
1 egg
1 tsp vanilla

1 1/2 cups flour
1 tsp (baking soda OR baking powder)
1/2 tsp salt
1 cup chocolate chips

1. Melt butter in saucepan.
2. Stir in both kinds of sugar.
3. Let cool 5 minutes.
4. Stir in egg and vanilla.
5. Stir in flour, baking soda OR baking powder, and salt.
6. Make sure dough is cool.
7. Stir in chocolate chips.

8. Measure scoops of dough onto baking sheet.
9. Bake 9 minutes at 350.
10. Allow to cool on pan at least 5 minutes before removing to rack.

The hypothesis was correct! The baking-powder cookies remained tall and puffy, while the baking-soda cookies spread a little more, so they were wider and flatter. Both cookies were delicious; it's just a question of the shape and texture you prefer.

Little Brother measured the cookies after they baked and cooled. The baking-powder cookies averaged 1 inch tall and 1 3/4 inches wide. The baking-soda cookies averaged 1/2-inch tall and 2 1/2 inches wide.

Personally, I preferred the cookies with baking soda. I like a cookie with a crispy outside and chewy inside. The baking-powder cookies were softer and puffier.

The proof is in the cookie!