A meal aboard the International Space Station (ISS) is far more than cuisine. It links engineering, hygiene, logistics and psychology. The French bonus menu for ESA astronaut Sophie Adenot began in a kitchen in France and reached the ISS in prepared single‑serve packs — after testing, sensory trials and numerous small adjustments so that classic recipes also work in microgravity.
From idea to testing
At the start was the question: which dishes carry memories, boost well‑being — and can be implemented safely? Traditional recipes often have complex textures and can crumble or drip. In microgravity, particles and liquids would float around the cabin. Ingredients and preparations with a high risk of crumbs or splashes were ruled out. Instead of airy bread, more compact alternatives were used; very liquid components were adapted.
Recipe adaptation: taste and safety
Two goals guided the revisions: enjoyment and safety. Seasoning and texture were deliberately adjusted because many crew members perceive flavors as less intense in microgravity — among other reasons due to changed pressure conditions in the head. Stronger spices or more intense aromas partially compensate for this. Safety requirements concerned microbiological stability, particle release and compatibility with the onboard environment.
Preservation, packaging and testing
The dishes had to survive transport and storage: temperature fluctuations during launch, vibrations, accelerations and then months on board. Primarily used were thermal sterilization in retort pouches, blast freezing and freeze‑drying. These methods extend shelf life but alter texture and aroma — a balancing act between maintaining texture and ensuring safety.
Tight pouches and cans prevent crumbs and leaks; resealable containers structure portions; labels simplify preparation and consumption. Every batch was tested in the lab for microbes, residues and nutrient stability. In addition, test series simulated transport and onboard handling: vibration, temperature shocks and opening attempts in mock‑ups of the ISS interior.
Logistics to orbit
Gourmet dishes reach the station only via resupply flights. Production and packaging therefore had to be aligned with narrow launch windows. Cargo follows clear priorities: safety, life support — and only then comfort items like bonus menus. Mass and volume were calculated precisely because every extra kilogram increases launch requirements.
Preparation on board
The station has simple heating devices, a rehydration adapter and limited work surfaces. Ovens or complex cooking appliances are absent. Earth‑fresh baked goods therefore arrive pre‑cooked and stabilized and are only gently reheated. Drinks are rehydrated via syringe or connection systems.
Shared meals as support
Good food works beyond the physical. Shared meals create rituals, strengthen the crew and provide cultural comfort. A French menu for a French astronaut is therefore more than a luxury: it supports psychological well‑being. Accordingly, time was invested in sensory trials and test meals with crew members. Taste is memory — and those memories help during long missions.
Knowledge transfer to Earth
Food preservation and packaging techniques developed for space provide ideas for more resilient food supplies on Earth. Freeze‑drying and advanced sterilization extend shelf life, reduce losses and ease supply in remote or climatically stressed regions. At the same time, space programs pursue waste reduction and onboard recycling — principles that can be applied to local supply chains and circular packaging.
Climate and resource considerations
Every launch produces emissions. Mass and volume are therefore relevant from a climate policy perspective as well. Lightweight packaging and efficient logistics reduce the need for launch capacity. In the long term, solutions that provide food with minimal resource input gain focus — through improved preservation, limited local production in habitable facilities and optimized materials.
More than a dish
For Sophie Adenot the bonus menu was a piece of home in orbit. The route from the kitchen to the ISS shows how closely science, technology and culture interact. Every portion on board is the result of careful tests, creative adaptation and precise planning — a small but significant field of research with benefits beyond spaceflight.