Batch Cooking: How to Organise a Whole Week of Meals in 2 Hours

Batch cooking literally means “cooking in batches”: instead of cooking each meal every day, you cook the base of several days in a single session. It is the difference between improvising while hungry (bad) and opening the fridge to find everything sorted (good). It is not the same as meal prep with closed containers, where each box is already a dish with its calories counted (you will find that in our guide to weekly meal prep with kcal per container): here you cook separate components and decide each day how to put them together.

What to cook: 5 building blocks for 7 days

Quantities for one person, planned for the 7 lunches of the week and 5 dinners. Few building blocks on purpose: fewer preparations, shorter session.

• Roast chicken: 600 g of raw breast or thigh, in 4 portions.
• Lentil stew with onion, carrot and pepper: 300 g dry, in 4 portions.
• Rice (white or brown): 240 g uncooked, in 4 portions of 60 g.
• One large tray of roasted vegetables: sweet potato, pepper, courgette and onion.
• 6 hard-boiled eggs.
• Dressings made fresh that do not take up session time: lemon and oil, yoghurt with spices, mustard.

The 2-hour session, minute by minute

The timings are a guide: they depend on your oven, the size of the pieces and the type of rice. The only fixed number is the chicken: 74 °C (165 °F) in the centre (USDA). The rule that makes it all fit into 2 hours: never wait for one thing to finish before starting the next.

• Minute 0-15: oven at 200 °C. Chop onion, carrot and pepper, soften them in the pot and add the lentils with water or stock: 30-40 minutes on a low heat.
• Minute 15-30: cut the sweet potato, pepper, courgette and onion for the tray. Put the rice water on to heat.
• Minute 30: the vegetable tray goes in (35-40 minutes) and, on another tray, the chicken with lemon, garlic and spices (25-35 minutes, until it reaches 74 °C in the centre). Cook the rice for the time on the packet.
• Minute 35: eggs in to boil for 10-12 minutes, then into cold water. Meanwhile, wash whatever you will not use again.
• Minute 55-70: the chicken, lentils and rice come off. Spread the rice in flat containers so it cools within an hour: Monday’s portion goes in the fridge and the other three in the freezer.
• Minute 70: the vegetables come out. Cut the chicken into portions: smaller pieces cool faster (USDA).
• Minute 75-110: divide into shallow containers, do not stack them, label with the day and store: Monday to Wednesday in the fridge and Thursday onwards in the freezer. Nothing should spend more than 2 hours out from the moment it left the heat.

The 7-day plan: what you eat and where it comes from

This is how the building blocks are spread so that nothing in the fridge goes past the USDA’s 3-4 days and the rest comes from the freezer or the Wednesday mini-session. The result: 7 lunches and 5 dinners, with two free dinners for the unexpected. If you want to stick it on the fridge, the weekly menu template takes a minute to fill in and print.

The Wednesday mini-session: 30 minutes that save the weekend

If you cook everything on Sunday, Thursday onwards has to come out of the freezer or go past the 3-4 days in the fridge. The practical fix is to split it: on Wednesday evening, with the oven at 200 °C, make a second tray of vegetables and a frittata (6 eggs beaten with chopped vegetables in a dish, 20-25 minutes). Half an hour, one dish and one tray to wash, and from Thursday to Sunday everything is within its time limit: baked egg dishes keep 3-4 days in the fridge (FoodSafety.gov).

What keeps and what does not

Fridge times are about safety and count from the day you cook. Freezer times are about quality: at −18 °C (0 °F) food stays safe indefinitely but loses texture and flavour (FoodSafety.gov). Whatever you thaw in the fridge has another 3-4 days (USDA).

Cooling, storing and reheating: the rules for a big session

In batch cooking the risk lies less in the days in the fridge than in the hours on the worktop: a big pot of stew takes a long time to cool, and that lukewarm time is what bacteria take advantage of (USDA). These are the rules from food safety agencies:

• No more than 2 hours at room temperature from the moment something leaves the heat, according to the USDA and AESAN (1 hour if it is above 32 °C / 90 °F, according to the USDA).
• Do not put the whole pot in the fridge: divide the stew into shallow containers and cut the chicken into pieces. Hot food can go straight into the fridge (USDA); what you should avoid is stacking containers, because air cannot circulate and they cool unevenly (AESAN).
• Reheat to 74 °C (165 °F) in the centre (USDA; AESAN asks for at least 15 seconds at that temperature); stews and sauces until they boil. In the microwave, cover and stir halfway, because it leaves cold patches. Only the portion you are going to eat.
• If you take a large container out of the freezer, you can thaw it in the fridge, take out a portion and refreeze the rest without heating it (USDA). Rice, however, is reheated only once.

Shopping list for one person

• Protein: 600 g of chicken breast or thigh, 12 eggs (6 to boil on Sunday and 6 for the Wednesday frittata), 300 g of dry lentils and a large pot of plain yoghurt.
• Grains: 240 g of rice and some wholemeal tortillas for the wrap.
• Vegetables for two trays and the stew: 2 sweet potatoes, 4 peppers, 3 courgettes, 4 onions and 2 carrots; leafy greens and tomatoes for the dinners.
• Store cupboard: olive oil, lemons, garlic, paprika, cumin and mustard.
• Back-up: a bag of frozen vegetables for the day the fresh ones run out.

How to adapt it to your household

• For two: double the quantities. It fits in the same oven with two trays and in the same pot, so the time grows much less than the amount of food.
• With children: the same building blocks, presented differently (chicken in strips, rice and vegetables separate, sauce on the side). That way you do not cook two menus.
• By season: in summer, roasted courgette, aubergine and pepper with cold dinners; in winter, squash, cauliflower or broccoli and hearty stews. The building blocks and the session order stay the same.

Mistakes that break the system

• Starting too ambitiously: 14 different recipes in the first week. Start with these 5 building blocks and add complexity later.
• Not labelling: by day four you will not know what was cooked first. Masking tape and a marker with the cooking day.
• Leaving no gaps: two free dinners a week absorb the unexpected without throwing food away.

What the studies say (and their limits)

There are no trials on batch cooking as such. The closest evidence: among 40,554 French adults in the NutriNet-Santé study, people who planned their meals had a diet closer to the guidelines (OR 1.13) and more varied (OR 1.25), and were less likely to have obesity (OR 0.79 in women and 0.81 in men) (Ducrot, 2017). A review of cooking skills found some positive associations between being able to cook and eating more fruit and vegetables, but few lasting dietary changes (McGowan, 2017). These are associations, not proof that batch cooking makes you lose weight.

Batch cooking is the habit that makes healthy eating most sustainable. Spend two hours on Sunday and half an hour on Wednesday, log your meals with Renzy, and forget about improvising while hungry for the rest of the week.