Quick answer: Start meal prep by counting meals, not filling every container you own. For a two-adult example, two separate four-portion dishes make eight main-dish portions. Refrigerate only what will be eaten within the food-safety window and freeze the rest promptly in meal-sized containers. Label each portion, defrost it in the fridge and reheat it only once until steaming hot throughout.

Meal prep is useful when it solves a particular week: a late shift, a night when the shops are shut or an ingredient you need to use. Cooking eight portions does not mean eight identical dinners, and it certainly does not make a week's worth of cooked food safe in the fridge. The practical questions are how much food the household will actually eat, which ingredients are already available, how many containers fit in the freezer, and how the food will be cooled. This UK guide provides a retailer-neutral worked quantity ledger and a storage timetable for two adults. It is a different task from choosing separate dinners in the seven-dinner UK family plan, or planning a family-of-four shop in the Morrisons batch-cooking guide.

The two dish ideas and quantities below are illustrative planning examples, not kitchen-tested recipes. Use complete recipes and follow their ingredient labels and cooking instructions. Check all ingredients and allergens for your own household; no meal in this guide has been checked for a particular allergy. AI-generated content. Always verify ingredients and allergen information yourself.

How much should you cook in one batch?#

Start with the meal slots and the freezer space. If two adults want one ready meal tomorrow, two later in the week and one the following week, that is eight main-dish portions, not a requirement to cook every lunch and dinner for seven days. Decide where each portion will go before buying extra food. If you cannot cool and store eight safely, make a smaller batch.

Here is a deliberately modest allocation from a Sunday cook. The dates are examples; your actual timetable must follow when food was cooked, cooled and fully defrosted.

Planned meal for two adults Portions Storage decision on cooking day
Monday: lentil and vegetable sauce 2 Cool promptly; refrigerate for the next day.
Wednesday: chicken and vegetable casserole 2 Cool promptly; freeze in two single portions.
Friday: lentil and vegetable sauce 2 Cool promptly; freeze in two single portions.
Following week: chicken and vegetable casserole 2 Cool promptly; freeze in two single portions.
Total 8 2 refrigerated, 6 frozen

Cook a starchy side, such as pasta, potatoes or rice, when the meal is served rather than silently treating it as included in the eight portions. Add a fresh or suitably cooked vegetable as needed. The NHS Eatwell Guide describes balance over a day or week, not a demand that every freezer container reproduce its diagram. Anyone with specific medical or dietary needs may require individual advice.

Which dishes make a workable freezer batch?#

Choose dishes that portion easily and leave delicate sides until serving. A lentil and vegetable sauce and a chicken and vegetable casserole provide different meals without requiring two entirely separate shops. Sauce-based dishes are convenient to divide into meal-sized containers. A crisp salad, yoghurt topping or fresh herbs can be added after reheating rather than frozen with the core meal. These are practical texture suggestions, not claims that a particular recipe has been tested here.

For the quantity exercise, plan four portions of each dish:

  • Lentil and vegetable sauce: 250 g dry red lentils, two 400 g tins of chopped tomatoes (800 g net, not drained), about 300 g raw onion, 250 g raw carrot and two loose peppers (about 300 g in this example). Water, oil and seasoning depend on the complete recipe you choose.
  • Chicken and vegetable casserole: 600 g raw chicken, about 300 g raw onion, 250 g raw carrot, one 250 g pack of mushrooms and 300 g frozen peas. Use a complete recipe for the cooking liquid, seasoning and method; a stock cube, oil or other cupboard item is not a free ingredient if you need to buy it.

These quantities illustrate the shopping and portioning arithmetic. They are not an assurance that a particular pot will yield four equal cooked servings or that it will be done in a stated number of minutes. Follow the recipe and pack instructions, cook poultry thoroughly and check the centre. The Food Standards Agency's cooking guidance explains temperature and visual checks for poultry, including use of a clean thermometer. Keep raw chicken, its juices and utensils away from ready-to-eat food.

What should go on the shopping list?#

Write down the quantity needed, the real pack you buy and the amount left. A recipe's 300 g of peas is not a 300 g checkout purchase if your shop only has a 1 kg bag. The table below assumes the example packs are available; it does not claim these are today's sizes or prices at Tesco, Aldi, Lidl, Asda, Morrisons, Sainsbury's, Waitrose, M&S or Ocado. Check the actual shelf or online listing and revise the ledger if a pack differs.

Ingredient and measurement basis Amount used across both dishes Illustrative purchase Amount left after cooking
Red lentils, dry 250 g One 500 g bag 250 g dry
Chopped tomatoes, tin net weight 800 g Two 400 g tins None
Onion, raw weight About 600 g One 1 kg bag About 400 g raw
Carrot, raw weight 500 g One 1 kg bag 500 g raw
Peppers, raw weight About 300 g Two loose peppers of about 150 g each None
Chicken, raw weight 600 g One 600 g pack if available None; recalculate for a different pack
Mushrooms, raw weight 250 g One 250 g pack None
Peas, frozen weight 300 g One 1 kg bag 700 g frozen

This is a purchase-versus-use ledger, not a priced basket. It excludes sides, oil, liquid and seasonings until you choose complete recipes; add them before shopping if needed. Check your cupboards and freezer first, then cross off only quantities that are safe and suitable to use. If onions are sold loose in your shop, buying roughly the needed amount may make more sense than taking a 1 kg bag. If a 600 g chicken pack is unavailable, do not quietly assume a 650 g or 1 kg pack costs the same or leaves no remainder. Record the actual pack and a safe plan for any uncooked remainder. Never use a raw chicken remainder past its use-by date.

Where a recipe calls for drained beans or another drained ingredient, do not confuse the net weight on the tin with the edible drained weight. This worked example uses tomatoes with their liquid and dry lentils, so its units are explicit. A real cost comparison would need a dated shop, pack prices, offers, delivery charges and an account of what was purchased versus consumed. This article does not promise that batch cooking saves a fixed number of pounds.

If checkout spend is the decision you need to make, the Asda pack-cost worksheet keeps the full packs bought separate from the amounts used in its own three-dinner example. It is not a price estimate for this freezer batch.

How do you cook and cool a batch safely?#

Set up the cooling space before starting. Clear a shelf in a fridge at 0–5°C and room in a freezer around −18°C. Have clean, shallow or smaller containers ready so hot food is not left as one deep pot while you look for lids. The FSA's chilling and freezing guidance advises cooling cooked food and getting it into the fridge within one to two hours; dividing it into smaller portions speeds cooling. Food Standards Scotland also advises not leaving cooked food at room temperature for longer than one to two hours.

Keep raw and cooked food separate while working. Cook each dish according to a full recipe and the actual pack instructions. When cooking is complete, divide the food into the planned eight portions, cool it promptly, then put two portions in the fridge and six in the freezer. Do not leave all eight in the fridge because you expect to remember to freeze them later. The FSA says ordinary leftovers should be eaten within 48 hours or frozen if that will not be possible; Scottish guidance says to eat refrigerated leftovers within two days.

Label each frozen portion with the dish name, cooking/freezing date, number of portions and any known household-relevant ingredients. This is for identification and planning, not a substitute for checking the actual ingredient packaging for allergens. Use airtight freezer-suitable packaging and check the container's heating instructions. The FSA notes that freezer burn affects quality and advises packaging food carefully; it does not make an undated, poorly handled batch safe.

How do you defrost and reheat freezer meals?#

Move only the servings you need into the fridge to defrost, then use them promptly. The FSA's defrosting advice says to defrost in the fridge, ensure the centre is fully thawed and use food within 24 hours after it has fully defrosted. Food Standards Scotland allows one to two days after defrosting in its chilling guidance. Using it within 24 hours after full thaw is a simple conservative rule for this UK example; follow any stricter product instructions. Do not defrost a casserole on the worktop.

Reheat a single portion once until steaming hot throughout, not merely warm at the edges. Stir or turn food heated in a microwave to avoid cold patches; the FSA's leftovers guidance specifically warns about uneven microwave heating and advises reheating leftovers only once. If you thaw raw poultry rather than a finished casserole, keep it covered on the bottom fridge shelf so juices cannot drip onto ready-to-eat food, and cook it thoroughly following its pack instructions.

Cooked rice needs a separate decision. Food Standards Scotland says to cool cooked rice as quickly as possible, ideally within one hour, refrigerate it and eat it within 24 hours; reheat it no more than once until steaming hot. In this beginner batch, cooking rice fresh with the thawed main dish is the easier route. Do not apply the ordinary two-day leftovers window to a box of cooked rice.

What if your week changes?#

Change the allocation while food is still safe, rather than forcing yourself to eat to the plan. If Monday's dinner is cancelled, check when the refrigerated portions were cooked and cooled. Freeze them promptly if they are still within a safe window and suitable for freezing; do not assume a freezer reverses unsafe storage. If Wednesday's meal moves to Thursday, note when the two frozen portions became fully defrosted and use them within the relevant guidance. If only one person is eating, defrost one labelled portion instead of reheating a two-person tub and cooling it again.

The lentils and peas remaining from the shopping example are not waste on cooking day: they are still dry or frozen. The onion and carrot leftovers need a specific next use while they remain suitable. An honest batch plan records those quantities for a future meal rather than claiming this one shop has no waste. A simple household waste diary can show what was actually discarded later; this guide focuses on safe batch production.

A short checklist before your first freezer batch#

  1. Count real meal slots and decide the number of portions; check fridge and freezer capacity.
  2. Choose complete recipes that suit your household's ingredients and allergens.
  3. List raw, dry, net and frozen quantities in the correct units; compare them with real packs.
  4. Prepare clean, smaller containers and a clear cooling space before cooking.
  5. Keep raw poultry separate, follow recipe and pack cooking instructions, then portion and cool promptly.
  6. Refrigerate only the near-term servings; freeze the others promptly and label every container.
  7. Defrost in the fridge, observe the fully-defrosted use window and reheat each portion only once until steaming hot throughout.
  8. Record what was eaten and what ingredients remain before planning the next batch.

Sources and further reading

About the author

Alexander Eriksson

Alexander Eriksson is the founder and CEO of Smaklig. He founded Smaklig in 2026 and has worked with data-driven optimisation since 1998. He is the named author responsible for Smaklig’s UK meal-planning guides. His editorial work explains the assumptions behind example meals, shopping quantities and retailer information so readers can check what a guide covers before using it. The UK guides link to official sources for food and health information and distinguish general guidance from illustrative meal-planning examples. Alexander’s byline identifies editorial responsibility. It does not represent a medical, dietetic or food-safety qualification, a clinical review, or personal testing of every UK supermarket service. The guides provide general information and do not offer individual medical or nutrition advice.