But wait! That 1.5 cups is after you pour off the liquid, which is technically called “aquafaba” and is a vegan miracle for whipping into meringues. If you dump the whole can—beans, juice, and all—you’ll get closer to 1.75 cups. I once tried to make a soup without draining, and it turned into a salty, bean-flavored swamp. Lesson learned: always drain unless you enjoy waterboarding your taste buds.
Here’s where it gets weird. Different brands play a dirty little game with their can sizes. A 14.5-ounce can? That’s about 1.25 cups drained. A giant 29-ounce can—the kind that makes you question your life choices—holds a shocking 3 full cups. I once bought one thinking it was a normal can and ended up with enough beans to feed a small army. Or just me, for three days straight. I don’t regret it.
Why You Should Actually Care
Look, I know you could just guess. But guessing leads to bean trauma. Imagine making a chili that’s mostly bean juice because you overestimated. Or a black bean burger that crumbles into dust because you used too many solids. The 1.5 cup rule is your shield against culinary heartbreak. Memorize it. Tattoo it on your arm. Or just write it on a sticky note and put it on your fridge. I did. It says “Beans: 1.5 cups, dummy.”
Here’s a surprising fact that will make you the star of your next dinner party: a single can of black beans contains roughly 15 grams of protein and 15 grams of fiber. That’s more fiber than a bowl of oatmeal from a very ambitious cow. Eat a whole can in one sitting? Your digestive system will send you a thank-you card, followed by a strongly worded letter about air travel.
