Cooking for One Without Throwing Half of It Away

You buy a bag of spinach for one recipe. You use a third of it. The rest sits in the fridge for five days, quietly turning into something you don’t want to touch, and goes in the bin. Meanwhile you’ve eaten the same chilli four nights running because the recipe served four.

If you live alone, this probably sounds familiar. Cooking for one comes with a waste problem that isn’t anybody’s fault. The food system is set up for households of three or four, and you’re left adapting it.

You’re also far from unusual. According to the US Census Bureau, there were 39.7 million one-person households in the US in 2025, 29% of all households, up from 20% in 1975. In the UK, the ONS counted 8.4 million people living alone in 2024, almost a third (29.5%) of households. Single-person households are one of the most common household types in both countries, yet shop packaging, recipes and most food advice still assume a family.

This guide covers the specific problems of cooking for one and the practical fixes: how to shop, how to use the freezer, how to plan meals that share ingredients, and how to avoid eating the same dish all week.

Why cooking for one wastes more

Packaging is sized for families

A bag of salad, a bunch of coriander, a pack of chicken thighs, a loaf of bread and a two-pint bottle of milk are all sized for more than one person to use within a few days. On your own, you have two choices: eat the same thing repeatedly to finish it, or throw part of it away.

Recipes assume four servings

Most recipes serve four. Halving them is easy for some things and awkward for others (half an egg, a quarter of a tin), and the leftover portions need a plan or they become waste.

”Cheaper per kilo” isn’t cheaper for you

The larger pack usually has the better unit price on the shelf label. But the unit price assumes you eat all of it. If you live alone and throw away half of a big pack, the “bargain” costs you more than the small one would have.

Here’s a quick example. A 1kg bag of carrots costs £0.80, and three loose carrots (about 300g) cost £0.45. Per kilo, the bag looks much cheaper: £0.80 against £1.50. But if you only eat 300g before the rest go soft, the bag works out at about £2.67 per kilo you actually ate, nearly twice the price of buying loose.

The real price of food is what you paid divided by how much you ate. For one-person households, that changes almost every shopping decision.

Nobody else notices

In a shared kitchen, someone else might notice the yoghurt going out of date. When you live alone, there’s no second pair of eyes. Busy weeks, evenings out and travel all mean food sits unnoticed for longer.

Eating out disrupts plans

People living alone often have less predictable evenings. A last-minute dinner invitation is great, but it means the chicken you bought for that night now needs a new plan.

How to shop for one

Buy loose, buy small

Wherever possible, buy fresh food in the amount you’ll actually use.

• Loose fruit and vegetables rather than bags. Two peppers, not a pack of three. Four potatoes, not a 2kg bag.
• Deli counters and butchers will sell you two slices, one chicken breast or 150g of mince.
• Smaller loaves, or a whole loaf with half put in the freezer straight away.
• Small bottles of milk, even if they cost a little more per litre.

In the UK, this is getting easier: WRAP has been pushing supermarkets to sell more uncut fresh produce loose, specifically to help people buy the amount they need.

Lean on the freezer aisle

Frozen vegetables, fruit, prawns, fish fillets and even herbs are ideal for cooking for one. You use exactly what you need and the rest keeps for months. There’s no meaningful nutritional penalty: vegetables are frozen soon after harvest.

Good staples to keep: peas, sweetcorn, spinach, mixed peppers, berries, fish fillets, prawns and chopped onions.

Shop twice a week, briefly

One big shop forces you to predict a whole week of meals and appetite. For a household of one, two small shops (one main, one quick top-up for fresh food) usually waste less. The second shop should be short and planned, with a list, so it doesn’t become an excuse for impulse buys.

Choose long-lasting fresh food

Some fresh food lasts far longer than others. If you’re cooking for one, favour the durable options:

Lasts a week or more	Lasts a few days
Cabbage, carrots, celery, onions, potatoes, squash, apples, citrus, hard cheese, eggs, whole heads of lettuce	Bagged salad, soft herbs, mushrooms, berries, fresh fish, mince, soft cheese

The short-lived foods aren’t off limits. Just buy them for a specific meal in the next day or two.

The freezer is your second person

When there’s only one of you, the freezer does the job a second person would: it eats the other portions, just later.

Cook four portions, freeze three

For dishes that freeze well (chilli, curry, soup, stew, ragù, dal and pasta sauces), cook the full recipe. Eat one portion now, and freeze the rest straight away in single portions.

The key is straight away. If the leftovers go in the fridge first, they tend to stay there until they’re no longer good. Freeze them as soon as they’ve cooled.

Freeze in flat, single portions

Freeze portions flat in labelled bags. They stack neatly, defrost quickly, and you can see what you have. A flat bag of curry thaws in about 20 minutes in a bowl of warm water, which makes it a real alternative to a takeaway on a tired evening.

Label every bag with what it is and the date. Frozen portions of different dishes look remarkably similar after a few weeks.

Freeze ingredients, not just meals

A lot of single-person waste is partly used ingredients. Freeze them before they turn:

• Bread: half a loaf on the day you buy it. Toast from frozen.
• Half a tin of tomatoes or coconut milk: flat in a bag.
• Tomato paste: in spoonfuls on baking paper, then bag them.
• Fresh herbs: chopped, in an ice cube tray with oil.
• Ginger and chillies: whole. Grate from frozen.
• Cheese: grated, in a bag.
• Cooked rice: cooled quickly and frozen in portions within an hour of cooking. Reheat until steaming hot.

There’s a full guide in Freezer amnesia: how to stop losing food in your own freezer.

The free version covers a one-person kitchen. Pantry tracking, barcode scanning, expiry reminders and nutrition are all in the free version. Download Korgo for iPhone →

Plan meals that share ingredients

The most effective planning trick for one person is to choose meals for the week that use the same fresh ingredients in different ways. Then you can buy normal-sized packs and still use them up.

Here’s a three-meal example built around one bag of spinach, one pack of chicken thighs and one red pepper:

Meal	Uses
Monday: chicken thigh traybake with peppers and onions	2 chicken thighs, half the pepper
Wednesday: chicken, spinach and chickpea curry	2 chicken thighs, half the spinach
Friday: spinach, pepper and cheese frittata	Remaining spinach and pepper

Three different dinners. Nothing left over. And none of them is the same dish four nights in a row.

Herbs are a good example too. If you buy coriander for a curry, plan a second use for it that week: a salsa, a dressing, or scattered over eggs.

Avoid eating the same thing all week

The “cook once, eat four times” approach saves effort but gets boring, and boredom leads to waste: by night three, the leftovers lose to a takeaway.

Instead of eating the same dish four times, cook a base and change it each time.

• Roast a tray of vegetables: night one, with couscous and feta; night two, blended into soup; night three, in a wrap with hummus.
• Cook a pot of beans or lentils: night one, as a chilli on rice; night two, in a quesadilla; night three, with eggs for breakfast.
• Make a batch of plain shredded chicken: night one, in a grain bowl; night two, in a stir-fry; night three, in a sandwich.

The cooking effort is the same as batch cooking one dish. You just finish it differently.

Recipes that suit one person

Some dishes naturally work for one, without leftovers to manage:

• Omelettes and frittatas. Two or three eggs, plus whatever’s in the fridge.
• Fried rice. One portion of cooked rice, any vegetables, an egg.
• Pasta. You can cook exactly 80 to 100g, and the sauce can be anything.
• Quesadillas and toasties. Small amounts of several things.
• Grain bowls. A good way to use the ends of several ingredients.
• Baked potato with any topping.
• Noodle soup with stock, frozen vegetables and an egg.

For more of these, see What to cook with what you already have, which works through eight template meals that take almost anything.

Keep track of what’s open

When you live alone, the most useful habit isn’t cooking skill. It’s knowing what’s in the fridge and roughly when it needs using. With nobody else to notice, an open tub of crème fraîche or half a pepper can easily disappear behind something else.

A few habits help:

• Keep an “eat me first” spot at the front of the fridge for anything that’s open or close to its date.
• Write the date on containers when you open something or put leftovers away.
• Check the fridge before you shop, so you don’t buy more of something that’s already open.
• Before an evening out, check whether anything in the fridge won’t survive another day, and freeze it before you go.

The hard part isn’t knowing these habits. It’s remembering them on a busy week when nobody else is around to remind you.

Doing it with Korgo

Korgo works well for one-person kitchens because it does the job of the second pair of eyes.

1. Add food as you unpack. Scan barcodes for packaged food; search by name for loose produce. It takes seconds, and the free version covers everything you need for this.
2. Get a nudge before food turns. Items close to their date stand out in the pantry, and Korgo sends gentle reminders, so the half pepper gets used and the leftovers get frozen in time.
3. Keep frozen portions on the list. When you freeze three portions of curry, add them with a date, so they don’t vanish in the freezer.
4. Check before you shop. Your pantry is on your phone, so you can see what’s already open when you’re standing in the shop.
5. See what you eat. Korgo fills in calories, protein, fat and carbs for everything you scan, which helps if you’re keeping track of your diet.
6. Get ideas for the odds and ends. With Korgo Pro, you get recipe suggestions based on what’s already in your pantry.

The short version

Cooking for one wastes more food because packaging and recipes are made for families, the “cheaper” big pack often isn’t, and nobody else notices what’s going off.

Buy loose and small. Judge the price by what you’ll actually eat. Use frozen food freely. Cook full recipes and freeze single portions straight away. Plan meals that share fresh ingredients. Cook a base and change it, rather than eating the same dish all week. And keep track of what’s open.

Living alone doesn’t have to mean choosing between eating the same dinner four nights in a row and throwing half your shopping away.

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Sources: US Census Bureau, America’s Families and Living Arrangements (2025) · Office for National Statistics, Families and households in the UK: 2024 · WRAP UK household food waste data