How to log food someone else cooked: family dinners, potlucks and a grandmother's recipe

At a lot of family tables nothing has a recipe. The stew is made “the usual way,” the rice gets “enough” oil, and the flatbread comes from a dough someone has made by feel for decades. If you log what you eat, that’s the hardest meal of the week. There’s no label to scan, no recipe to import and no scale anywhere near the table.

You can still log it well enough to be useful. Here’s the method I use for food someone else cooked, whether it’s a family dinner, a potluck or a friend’s signature dish.

1. Name the dish as specifically as you can

“Curry” covers everything from a light tomato and lentil dish to a lamb curry finished with cream. “Stew” is just as wide. The first step is to name what’s in front of you precisely enough that a generic entry will be close:

• The main protein: chicken, lamb, beef, beans, lentils, fish
• The sauce base: tomato, stock, coconut milk, cream, yogurt
• How it was cooked: stewed, fried, roasted, baked

“Chicken curry with coconut milk” or “beef and potato stew” will find you a far better starting entry than the bare name of the dish.

2. Find the anchor ingredient and size it

Most shared dishes have one ingredient that carries most of the calories: the rice, the meat, the beans, the pastry. Find it, and size it by hand.

• Rice, grains or pasta: a fist is about a cup, cooked.
• Meat or fish: a palm (without the fingers) is about 3 ounces.
• Beans and lentils: a fist is about a cup.
• Bread and pastry: log by the piece or slice, compared with your hand.

Get the anchor right and you’ve got most of the number. A soup that’s mostly broth with a little meat is light. A tagine heaped over couscous is mostly couscous.

3. Judge the fat: this is where the calories hide

Home cooks who cook by feel are usually more generous with fat than written recipes, and fat is the densest thing in the pot at about 9 calories a gram. A tablespoon of oil is about 120 calories. A tablespoon of butter is about 100. Neither is visible once it’s in the sauce.

You can’t measure it, but you can read the plate. The table at the end of this post lists the signs I look for: a sheen on the sauce, crisp golden edges, a glossy creamy finish, shiny separate rice. When I see them I add a tablespoon of oil or butter to the log for a generous serving. It’s rarely wrong by more than the amount I’d have missed by leaving it out.

4. Size the portion honestly

Shared dishes are served by the spoonful, and spoonfuls are generous. Two big ladles of stew can easily be two cups. If you’re unsure, round up, because people almost always underestimate food they didn’t serve themselves.

Log what’s on the plate before you start, while you can still see it. Seconds go in as their own entry when you take them. Don’t try to remember the whole evening the next morning.

5. Accept a range, then move on

You won’t know the exact number, and neither would anyone else at the table. Recipe panels for the same dish can disagree by hundreds of calories (here’s why). A careful estimate of a homemade dish is often closer to the truth than a precise-looking figure from a recipe that wasn’t the one in the pot.

So log your best estimate, and if you’re torn between two entries, pick the richer one. Then put the phone away and eat.

When to ask, and when not to

A single question can settle the biggest unknown: “Is this coconut milk or tomato?” or “Did you fry the onions in butter?” Cooks are usually happy to talk about their food. But a family dinner isn’t an interview, and nobody wants their grandmother’s recipe audited. If the question doesn’t come up naturally, estimate and enjoy it.

A worked example

Here’s how a typical plate at a family dinner might go:

• Lamb stew with potatoes: two ladles, about two cups. Log “lamb and potato stew,” two cups, with an extra tablespoon of oil because the surface is glossy.
• Rice: about a fist, so roughly a cup cooked. It’s shiny and fragrant, so add a teaspoon of oil.
• Flatbread: one piece, about the size of a spread hand.
• Salad with dressing: a generous handful, and a tablespoon of oil-based dressing.

That takes about a minute. It isn’t perfect, but it’s much closer than “family dinner, skipped,” and it’s honest about the oil, which is where most homemade meals get underestimated.

If logging spoils the meal

Sometimes the right call is not to log at all. One family dinner is a small part of a week, and these meals matter for reasons that have nothing to do with numbers. If tracking would take the pleasure out of it, skip it and start again at breakfast. The habit survives the occasional night off. It doesn’t survive feeling you can’t sit at your own family’s table.