Batch cooking is one of the easiest ways to save time on weeknights and use up food before it goes off. Cook once, portion it up, freeze it, and you've got ready meals in the freezer for the weeks ahead. Foil trays with lids are a popular choice for this because they're light, stack neatly and can be recycled when you're done.
Here's how to do it safely, using UK food-safety advice.
Why use foil trays for batch cooking?
- One container from portioning to reheating. Portion, cool, lid and freeze, then take the lid off to reheat.
- Portion control. A 500 ml tray is a sensible size for individual or small portions, so you only defrost what you need.
- They stack. Same-size trays with flat lids make the most of freezer drawer space.
- Recyclable when clean. Foil food trays and takeaway containers are on Recycle Now's list of foil items that can be recycled. Wipe or dip them in washing-up water first. Check your council's rules with the postcode checker.
Our BARYAH 500 ml Foil Trays with Plastic Lids and 500 ml Foil Trays with Paper Lids come in packs of 30. Each tray measures about 14.2 × 11.5 × 5 cm.
Plastic lids or paper lids: which should you choose?
| Plastic lids | Paper lids | |
|---|---|---|
| See what's inside | Yes, clear lid | No |
| Labelling | Use a freezer label or masking tape | Use a freezer label or masking tape |
| Best for | Storage where you want to see the contents; giving food to family or neighbours | Neat, flat stacks in the freezer |
| In the oven | Take the lid off first | Take the lid off first unless the pack says otherwise |
Whichever you choose, the lid is for storage. The tray goes in the oven, the lid doesn't.
Step-by-step: batch cooking with foil trays
1. Cook something that freezes well
Stews, curries, chilli, bolognese, cottage pie, pasta bakes, soups and casseroles all freeze well. Check your recipe if you're unsure whether something freezes well.
2. Portion into trays
Fill each tray to a consistent level and leave a little space at the top, because liquids expand slightly as they freeze. Wipe the rim so the lid seals cleanly.
3. Cool quickly, then chill or freeze within two hours
The Food Standards Agency says to cool cooked food and get it into the fridge or freezer within one to two hours. Splitting it into smaller portions helps it cool faster (GOV.UK / FSA). Small trays are a big help here. Don't put hot food straight into the fridge.
Rice is the exception: the FSA advises cooling leftover rice as quickly as possible, ideally within one hour, and reheating it only once (FSA).
4. Lid and label
Label every tray with the dish, the date and whether it's cooked or raw. "Mystery stew" a month later isn't fun. A freezer label or a strip of masking tape works on either lid type.
5. Freeze flat and stack
Your freezer should be around –18°C (GOV.UK / FSA). Freeze trays flat in a single layer until solid, then stack them. Keep a simple list on the freezer door of what's inside.
Defrosting safely
- Defrost in the fridge, not on the worktop. If you can't do that, use the microwave's defrost setting immediately before cooking (GOV.UK / FSA). Tip the food out of the foil tray into a microwave-safe dish first.
- Sit the tray on a plate to catch any drips.
- Make sure it's fully defrosted in the middle before cooking, and use it within 24 hours of defrosting.
Reheating from a foil tray
- Oven: take the lid off, put the tray on a baking sheet for stability, and reheat until the food is steaming hot all the way through. The FSA says to heat food to steaming hot throughout rather than just warmed (FSA – Cooking your food). Times vary with the dish and your oven, so follow your recipe and check the centre. Cover loosely with foil if the top is browning too fast.
- Hob: tip the contents into a pan and stir often.
- Microwave: transfer the food to a microwave-safe dish first. Electrical Safety First warns that foil can create sparks and cause a fire in a microwave. Only put foil in a microwave if your microwave's own manual specifically allows it.
- Reheat only once. The FSA says leftovers should only ever be reheated once.
A note on acidic foods
It's best not to store very acidic foods, such as tomatoes, rhubarb, cabbage and soft fruit, in aluminium foil or aluminium containers for long. That's the advice in Wrexham Council's food-storage guidance, and Germany's Federal Institute for Risk Assessment gives similar advice about sour and salty foods (BfR FAQ, PDF). For a tomato-heavy sauce you plan to keep for a long time, a glass or plastic freezer container may be the better choice. Foil trays suit stews, curries, pies and bakes well.
Batch cooking checklist
- Cook a dish that freezes well
- Portion into trays, leaving a little headspace
- Cool and chill or freeze within 1–2 hours (rice: ideally within 1 hour)
- Lid, label (dish + date), freeze flat at around –18°C
- Defrost in the fridge; use within 24 hours
- Lid off and into the oven until steaming hot; never microwave in foil unless your manual allows it
- Reheat once only
- Rinse clean trays and recycle them
Shop: Home & Kitchen · Foil Trays with Plastic Lids, 30-pack · Foil Trays with Paper Lids, 30-pack
FAQ
Can you freeze food in foil trays?
Foil trays with lids are widely used for freezing home-cooked meals. Cool the food first, get it in the freezer within one to two hours of cooking, and label it with the dish and date.
Can I reheat food in a foil tray in the oven?
Foil trays are widely used for oven reheating. Check the guidance on your pack, always remove plastic or paper lids first, and put the tray on a baking sheet so it doesn't bend when you lift it out.
Can you put foil trays in the microwave?
Not unless your microwave's manual specifically says you can. Foil can spark and cause a fire, so tip the food into a microwave-safe dish instead.
How long can I keep leftovers in the fridge?
The Food Standards Agency says to eat leftovers within 48 hours, or freeze them if you won't manage that.
How many times can I reheat batch-cooked food?
Once. The FSA advises only reheating food once, which is another reason single-portion trays are handy.
What size is a 500 ml foil tray?
Ours measure about 14.2 × 11.5 × 5 cm. That suits individual or small portions.
Are foil trays recyclable?
Clean foil trays can be recycled in many UK council collections. Wipe or rinse off the food first and check your local rules on Recycle Now.