What Creaming Butter and Sugar Actually Does
Creaming is not mixing. The sugar crystals cut air pockets into the butter, and those pockets are what your leavening later inflates. Here is what that changes.
Baking Science
Baking Science
What Each Ingredient in a Cake Actually Does
No ingredient in a cake does one job. Flour, sugar, fat, egg and leavener trade off against each other. Here is what actually changes when you alter one.