How to Cut Food Waste When You Meal Prep

Where It Actually Goes

Three places, in order. Fresh produce bought for the back half of the week, which spoils before you reach it. Portions cooked on Sunday that were still fine on Tuesday and are not by Friday. And the part-used pack - half a bag of spinach, two thirds of a tub of creme fraiche - bought because the recipe needed a small amount of something sold in a large amount.

Almost none of it is forgetfulness, which is why reminders do not fix it. It is a mismatch between how food is sold and how one household eats.

Shop for the Shape of the Week, Not the Length of It

Fresh salad, berries, fish and prepared vegetables realistically hold three or four days. Buying seven days of them guarantees the last two are a gamble. Plan fresh food for the front of the week and frozen or cupboard food for the back, and the same single shop covers seven days without anything sitting too long.

Frozen vegetables are the single most effective change here, because they cannot spoil while you decide. Used as the default rather than the fallback they remove the entire category of produce thrown away half used.

Freeze Early, Not Late

The instinct is to freeze what is left when it is about to turn. By then the food has already lost most of its life and you are freezing something you will enjoy less. Freeze on the day you cook, or the day after, while it is still what you meant to eat.

That also means portioning at the point of cooking rather than eating from a big container until it looks doubtful. Cook four, eat one, refrigerate one, freeze two - decided once, on Sunday, rather than negotiated every evening.

Use-By and Best-Before Are Not the Same Thing

Use-by is about safety. Do not eat food after its use-by date even if it looks and smells fine, and do not rely on your judgement instead - this is the date on meat, fish, dairy and prepared foods. Freezing before the use-by date pauses it, which is what makes the freezer useful here.

Best-before is about quality. Food past it is generally still safe and often perfectly good - dried pasta, tinned goods, biscuits and most cupboard staples are the usual cases. Judging those by sight, smell and taste is exactly what the date allows.

Confusing the two costs money in both directions: throwing away good cupboard food, and trusting your nose on something where the date was a safety instruction.