Meal prepping is the single most effective way to eat well, stay consistent, and stop overspending on food every week. This guide covers exactly how to do it in the UK — using ingredients from Aldi, Tesco, Lidl, and Sainsbury's — without spending more than £25 for five days of meals.
What is meal prep and why does it work
Meal prep means cooking a batch of food in one session — usually Sunday — so your meals for the week are ready to grab and go. You're not cooking from scratch every evening, not making impulsive food decisions when you're tired and hungry, and not ordering a takeaway because there's nothing easy to eat.
The reason it works is simple: decisions made in advance are better than decisions made when you're hungry. When your lunch is already portioned and in the fridge, you eat it. When it isn't, you don't.
For people trying to lose weight, build muscle, or just eat more consistently, meal prep removes the daily friction that derails progress. It also cuts the average UK household food spend significantly — batch cooking is cheaper per meal than cooking individually every day.
How to start meal prepping in the UK
The most common mistake is trying to prep everything at once. Start with just lunches for the working week — five identical or near-identical meals that take one cooking session to make.
A simple first-week setup:
- Protein: 1kg chicken thighs or tinned tuna (Aldi, ~£3–4)
- Carbs: 1kg rice or a bag of mixed pasta (Tesco own brand, ~£1)
- Veg: Frozen broccoli, frozen spinach, or a bag of stir-fry veg (Lidl, ~£1–2)
- Sauce: Soy sauce, hot sauce, or low-calorie BBQ sauce (~£1)
Cook the protein, cook the carbs, portion into five containers. That's a full week of lunches for under £8 and about 45 minutes of cooking.
Once that becomes habit, add dinners. Then breakfasts. Build up gradually rather than trying to overhaul everything at once.
UK supermarkets for budget meal prep
The cheapest places to buy meal prep staples in the UK:
Aldi and Lidl are consistently the best value for fresh protein (chicken, mince, eggs), frozen veg, and carb staples. Their own-brand products are nutritionally identical to branded equivalents at a fraction of the cost.
Tesco and Sainsbury's own-brand ranges are good for pantry staples — tinned tomatoes, pasta, rice, oats, tinned pulses. The Tesco Everyday Value and Sainsbury's Basics ranges are reliable and cheap.
Iceland is underrated for meal prep. Their bulk frozen chicken, frozen fish, and frozen veg bags offer strong value and a long shelf life — useful if you're buying for two weeks at a time.
Costco (if you have a membership) is worth it for large quantities of rice, oats, eggs, and tinned goods if you're prepping for a household.
How much does meal prep cost per week in the UK
A realistic week of meal-prepped food for one person in the UK:
| Item | Cost |
|---|---|
| 1kg chicken thighs (Aldi) | £3.49 |
| 1kg basmati rice | £1.09 |
| 500g oats | £0.89 |
| Frozen broccoli 900g | £1.09 |
| Tinned tomatoes x4 | £1.00 |
| Eggs x12 | £1.89 |
| Frozen spinach 900g | £1.09 |
| Tinned tuna x4 | £2.00 |
| Greek yoghurt 500g | £1.25 |
| Miscellaneous (sauces, spices) | £2.00 |
| Total | ~£15–18 |
That covers breakfast, lunch, and dinner for five days. The same meals bought as takeaways or meal deal equivalents would cost £60–80 per week.
Storing and reheating meal prep safely
Cooked food stored in the fridge is safe for 3–4 days. Prep Sunday, eat through Wednesday safely with no quality issues. Thursday and Friday meals should be frozen on Sunday and moved to the fridge on Wednesday night.
Use airtight containers — glass is best for reheating, plastic is fine if microwave-safe. Label containers with the day if it helps you stay organised.
Reheat to piping hot throughout before eating. Don't reheat rice more than once.
Meal prep guides
Step-by-step meal prep plans, UK shopping lists, and calorie-counted batch cooking recipes are linked below.