Can cooking skills help reduce food waste? What the evidence shows

Being a good cook may involve much more than knowing how to follow a recipe. Planning meals, managing ingredients, storing food correctly and knowing how to use leftovers are all skills that may help households make better use of the food they buy.

A 2026 narrative review published in the International Journal of Gastronomy and Food Science examined cooking skills in relation to sustainability, food and nutrition security, and food safety. It found that stronger cooking-related skills were associated with behaviours such as more home cooking, meal planning and using leftovers. These findings do not mean that learning to cook automatically causes people to waste less food, however.

Cooking skills are about more than cooking techniques

In research, cooking skills can include much more than chopping, mixing or heating food. They can overlap with broader food-management abilities such as choosing ingredients, planning meals, managing a food budget and making use of ingredients already at home.

That distinction matters for food waste. Someone can be very good at following a detailed recipe and still struggle when faced with several ingredients that need to be used before they spoil.

A systematic review published in 2026 included 28 studies involving 32,211 participants. Food-waste outcomes were assessed in 19 studies, and 15 reported favourable associations between stronger cooking-related skills, greater involvement in home cooking or cooking-based interventions and lower food waste or better waste-prevention behaviours. The evidence was not uniform, and many studies relied on cross-sectional designs, self-reported outcomes or other methods that limit causal conclusions.

Planning a meal may matter as much as knowing a recipe

One practical implication is that learning more recipes is not necessarily the only — or even the most useful — way to become better at managing food.

Checking what is already in the fridge before shopping, planning how perishable ingredients will be used, estimating portions and being able to adjust a meal around available ingredients can all make it easier to use food before it is discarded.

This broader ability is often discussed as part of food literacy: cooking is only one component, alongside planning, selecting, storing and making informed decisions about food.

Leftovers test a different kind of cooking skill

Following a recipe that starts with a shopping list is one task. Looking at a small amount of cooked rice, half a container of another ingredient and vegetables that need using soon is another.

The second situation requires flexibility. A cook needs to recognise which ingredients can work together, which should be used first and which can safely be stored for later. The 2026 review specifically identifies meal planning and leftover use as possible pathways linking cooking skills with more efficient household food use.

But using leftovers is not automatically the right choice in every situation. Food that has been stored improperly should not be eaten simply to avoid waste.

Food safety is part of managing food well

The same review links cooking skills with food-safety practices including hygiene, temperature control, appropriate storage and separation of raw and ready-to-eat foods.

That makes the relationship between cooking and waste more nuanced. Reducing food waste should not mean trying to save every food regardless of its condition. It means managing food early enough and well enough to give it the best chance of being used safely.

The scale of household waste makes those skills relevant well beyond individual kitchens. According to the UN Environment Programme’s Food Waste Index Report 2024, households accounted for the largest share of food waste measured across households, food service and retail.

Does learning to cook actually cause people to waste less?

The evidence is promising, but it does not support such a simple conclusion.

The main 2026 paper is a narrative review, which is useful for bringing evidence from different areas together but cannot establish a single causal effect.

The systematic review cited earlier found relatively consistent evidence around food-waste reduction and household food-resource management, while also stressing that stronger longitudinal and experimental studies are needed.

A separate systematic review published in PLOS One examined the development of cooking skills and outcomes related to diet and nutritional status in healthy adults. It found improvements in some self-reported dietary behaviours, but rated the certainty of the evidence as low or very low.

Cooking skills should therefore be seen as one possible tool rather than a complete solution. Time, income, access to food, household organisation and adequate storage all affect what people are able to do with the food they buy.

Which cooking skills may be most useful for reducing waste?

The research points towards a practical set of abilities: plan purchases and meals, know what food is already at home, estimate portions, store ingredients properly, use leftovers when they are still safe, and adapt meals to ingredients that need using.

In other words, the useful skill is not simply knowing how to cook. It is learning how to manage food from the moment it enters the kitchen until it is eaten.