Okay, first things first. Cooking is kinda like magic—except sometimes the magic fizzles because you forgot to convert quarts to cups. Yep, been there, botched my soup more times than I can count. (Why does measuring matter so much? Because measuring mess-ups turn dinner into sad leftovers, that’s why.) So here’s the deal: If you ever find yourself staring at a recipe that says “6 quarts of broth” but you only have a measuring cup that screams “I measure in…