*All my cookie recipes are half-recipes, so they use half an egg. A large egg is 50 grams. So, whisk it well, then measure out 25 grams. Better yet, just double the recipe and use 1 full egg.
I make half recipes at school because students don't need more than 12 cookies. I make half recipes at home because I have no self control.
Use good cocoa. The dough tastes sooooo good. The key to making edible cookie dough is microwaving the flour for a bit...