The procedure I performed to carry out my experimental design consisted of eight steps. First, I preheated the oven to 425F. Second, I gathered four mixing bowls and placed the dry ingredients in each mixing bowl. Third, I made a well/hole in the center of the dry ingredients of each mixing bowl and mixed in the wet ingredients. After that, I stirred the mixture together and then filled the muffin cups in the muffin pans about 2/3 full. I used separate colored muffin cups for each batch according to the amount of baking powder. Finally, I baked the muffins at 425F for about 15 minutes and then took them out and observed them.
-- 1. Preheat oven to 425 Fahrenheit 2. Gather 4 mixing bowls 3. Mix the dry ingredients in each mixing bowl: - 1/2 cup all purpose flour - 1/2 cup cornmeal - 1/2 tablespoon sugar - corresponding amount of baking powder (0,1,2,4 tsp.) 4. Make a well/hole in the center of the dry ingredients in each mixing bowl and then mix in the following ingredients: - 1 egg, slightly beaten - 1/2 cup milk - 1/8 cup (or 2 Tbsp.) melted butter 5. Stir the mixture to a smooth batter 6. Fill muffin cups (I recommend using different colored muffin cups for each different batch containing a different amount of baking powder) in the pan about 2/3 full. 7. Bake at 425F for 15-20 minutes or until they are nicely browned and baked through. 8. Compare each four different batch of muffins in weight (grams) height (cm) and texture (by sight and touch) |
Independent Variable:
- the different amounts of baking powder I will be putting into the different batches (0,1,2,4 tsp) Dependent Variable: - the affect of the baking powder on the height (cm) weight (grams) and texture (by sight and touch) of the muffins according to the different teaspoons of baking powder put into each batch Constants/Controls: - The brand of baking powder I will be using: Rumford - Baking procedure/other baking ingredients used to make muffins will remain the same: - 1/2 cup all purpose flour - 1/2 cup cornmeal - 1/2 tablespoon sugar - 1 egg, slightly beaten - 1/2 cup milk - 1/8 cup (or 2 Tbsp.) melted butter |