If you’ve ever grabbed the wrong measuring cup thinking, “Eh, close enough,” you are not alone. But mathematically speaking, 1/3 cup is noticeably bigger than 1/4 cup. We’re talking about a difference of roughly 2 tablespoons and 2 teaspoons. That doesn’t sound like a lot, until your cookie dough turns into a sad, runny puddle.
Think of it this way: a 1/4 cup holds about 60 milliliters, while a 1/3 cup holds about 79 milliliters. That’s a 19-milliliter gap—about the size of a generous gulp of water. (Or, in my case, the exact amount of tequila that ruins a good margarita.) Ignoring that gap is like saying a size 6 shoe is basically the same as a size 7. Your feet—and your batter—will protest.
