What Research Says About Home Cooking Frequency

What does research say about how often people cook at home?

Research consistently finds that people who cook or eat home-cooked meals more often report different eating and spending patterns from those who rarely do. Nearly all of it is observational, so it shows associations, not that cooking more will change anything for you.

This summary covers five studies from the US, UK and France. For each, it notes who was studied, what was measured, and the limits. It does not make diet or weight claims, and it is not nutrition advice.

What was studied?

How often US adults cook

Wolfson and Bleich (2015) analyzed the 2007 to 2010 National Health and Nutrition Examination Survey (NHANES), a nationally representative US survey. They grouped 9,569 adults aged 20 and over by how often someone in their household cooked dinner: 0 to 1, 2 to 5, or 6 to 7 times a week. Diet was measured with 24-hour dietary recalls and questions about fast food and ready meals.

Eating home-cooked meals in the UK

Mills and colleagues (2017) used baseline data from a population-based cohort of 11,396 UK adults aged 29 to 64. Participants reported how often they ate home-cooked main meals. Diet was measured with a 130-item food frequency questionnaire and a blood marker of vitamin C.

Time spent on food preparation

Monsivais, Aggarwal and Drewnowski (2014) surveyed 1,319 adults in Seattle in 2008 and 2009. They grouped people by daily time spent on food preparation and cleanup: under 1 hour, 1 to 2 hours, and over 2 hours. They measured how often people ate certain foods, used restaurants, and spent on food.

Meal planning

Ducrot and colleagues (2017) studied 40,554 French adults in the web-based NutriNet-Santé study. They asked whether people planned the foods they would eat over the next few days, and compared planners with non-planners on diet records and food variety.

Who cooks, and how that is changing

Taillie (2018) used the American Time Use Survey from 2003 to 2016 to track the share of US adults aged 18 to 65 who cooked on a given day and how long they spent cooking.

What did the studies find?

Some specifics:

• Frequency and intake. In the US data, households cooking dinner 6 to 7 times a week reported about 9,054 kilojoules a day, against 9,627 for households cooking 0 to 1 times. In the UK data, people eating home-cooked meals more than five times a week reported about 62 grams more fruit and 98 grams more vegetables a day than those eating them fewer than three times.
• Time and restaurants. In Seattle, the group spending the least time on food preparation was more likely to be working adults who prioritized convenience. They used fast-food restaurants more often and spent more per person on food away from home.
• Planning and variety. In France, meal planners were more likely to be in the top quarter for food variety (odds ratio 1.25) and for adherence to national guidelines (odds ratio 1.13).
• Who cooks. In the US, the share of college-educated men who cooked on a given day rose from 37.9 percent in 2003 to 51.9 percent in 2016. Women still cooked much more than men.

What do these studies not show?

• They do not show cause and effect. Every study except Taillie's was a single snapshot. People who cook more often may have more time, more money, different jobs, more cooking skill or different food preferences. Statistical adjustment reduces but cannot remove these differences. Several authors state directly that causality cannot be inferred.
• They rely on self-report. Cooking frequency, and in most cases diet, were reported by participants. People may misremember or report what they think is expected.
• "Cooking" meant different things. The US study asked about household dinner cooking, the UK study about eating home-cooked main meals, and the Seattle study about time spent on food preparation. A reheated frozen meal may count in one and not another.
• They do not test a change. None of these studies asked people to cook more and then measured what happened. They cannot tell you what cooking one more night a week would do.
• Populations differ. Results from the UK, France or one US city may not carry over to your household, budget or food environment.
• They are not about individual health. Associations across thousands of people say little about what any one person will experience.

What are the practical takeaways?

1. Treat cooking as a routine goal, not a health promise. The research is a reason to find home cooking worth trying, not proof it will change your diet, weight or spending.
2. Time is a real barrier. The Seattle findings match what many people report: less time means more convenience food. Routines that save time, like repeat meals and prep ahead, target that barrier directly. See how to cook at home more often.
3. Planning is common and simple. More than half of French participants planned meals at least occasionally. A three-dinner plan is a manageable start, as shown in how to meal plan for beginners.
4. Count meals eaten, not only meals cooked. The UK study measured eating home-cooked meals, which includes leftovers. Cooking double and eating leftovers is a legitimate way to raise that number.
5. Handle leftovers safely. If you cook more, follow USDA guidance to refrigerate leftovers within 2 hours and use them within 3 to 4 days.

Where can you apply this?

The 30-day home cooking plan builds repeat meals, cooking days, prep and backups step by step. You can build a personal cooking plan, write your week with the meal planner, or browse the cooking hub. If cooking needs to fit a medical diet, talk to a registered dietitian.