Dehydrating Food for Backpacking: A Beginner's Guide

Dehydrating food for backpacking at home lets you make lighter, cheaper and tastier trail meals than most store-bought options. The basics: choose low-fat foods, cut or spread them thin and even, dry fruit and vegetables at around 52–60°C (125–140°F), cook meat to a safe internal temperature before drying it at about 60–63°C (140–145°F), dry until brittle or leathery with no moisture, then store airtight and cool. On the trail, add boiling water, cover and wait 10–20 minutes.

Removing water cuts weight dramatically. A cooked chilli can lose 60 to 75% of its weight when dried, and it packs down into a small bag. This guide covers what works, what doesn't, safe temperatures, a few full-meal methods and how to rehydrate in camp.

What you need

• A dehydrator with adjustable temperature and solid trays or fruit-leather sheets (or an oven that can hold a low temperature with the door slightly ajar)
• Baking paper or silicone sheets for sauces and purées
• A sharp knife or mandoline for even slices
• Zip bags, vacuum sealer bags or jars, plus oxygen absorbers if storing long-term
• A kitchen scale and labels

Safe temperatures and times

Times vary with humidity, thickness and your machine. Temperatures for meat and poultry follow USDA Food Safety and Inspection Service guidance; fruit and vegetable ranges follow the National Center for Home Food Preservation.

What dehydrates well and what doesn't

Fat doesn't dry; it goes rancid. Keep meals low-fat when drying, then add fat back on the trail with olive oil packets, nut butter, cheese or coconut milk powder. Our high-calorie backpacking food guide covers the best fat sources to carry.

Method 1: dry components, assemble meals

The most flexible approach. Dry separate batches of rice, beans, mince, vegetables and sauce leather, then combine portions into bags.

1. Cook each ingredient as usual, with minimal oil.
2. Spread thin and even on trays.
3. Dry until fully crisp or leathery. Break up clumps halfway.
4. Cool, then store each in a labelled jar.
5. Before a trip, weigh portions into meal bags. Add spices, stock powder, milk or cheese powder.

Example: chilli bag = 40 g dried mince + 40 g dried beans + 20 g dried peppers and onion + 15 g tomato leather broken up + chilli spice + 30 g instant rice. Roughly 520 kcal and 35 g protein before oil. Add a 15 ml olive oil packet on the trail for about 120 kcal more.

Method 2: dry a whole cooked meal

Cook a full meal at home, such as chilli, bolognese, curry, risotto or stew, then spread it thin and dry it in one go.

1. Cook the meal with lean meat or legumes and very little oil. Cut everything small (pea-sized).
2. Spread about 5 mm thick on lined trays.
3. Dry at 57–63°C. After four hours, break it up and flip.
4. Continue until completely dry and crumbly, often 8–12 hours.
5. Weigh the dried result and write the original serving count on the bag so you can portion it.

Method 3: dry for no-cook or cold-soak meals

Choose ingredients that soften cold: couscous, instant rice noodles, ramen, thin-cut vegetables, bean flakes and dried mince crumbles. See no-cook backpacking meals for cold-soak recipes.

Rehydration on the trail

Tips:

• Use a cozy. An insulated pouch or pot cozy keeps the meal hot while it rehydrates and saves fuel.
• Start with less water. You can always add more; soupy meals can't be undone.
• Stir halfway.
• Pre-soak beans and mince at lunch in a leak-proof jar to speed up dinner.

Storage and shelf life

1. Cool completely before packing; warm food creates condensation.
2. Condition fruit in a jar for a few days, shaking daily. If moisture beads appear, dry it longer.
3. Store airtight in zip bags, vacuum bags or jars, in a cool, dark place.
4. Add oxygen absorbers for longer storage.
5. Freeze meat-containing meals until your trip.
6. Label with contents, date, serving size and water to add.

Well-dried, low-fat foods generally keep for weeks to a few months at room temperature; meals with meat keep longer frozen. If anything smells off or shows mould, throw it out.

Food safety basics

• Start with fresh, good-quality food and clean equipment.
• Heat meat and poultry to a safe internal temperature before or at the start of drying, as USDA advises, because a dehydrator alone may not heat meat enough to destroy bacteria.
• Dry thoroughly. Moisture left in food allows mould and bacteria to grow.
• Don't dehydrate dairy and eggs at home for long storage; use commercial powders.

How much weight does dehydrating save?

Rough estimates; weights vary with recipe and water content. Plug your dried meals into the backpacking food weight calculator and calorie density checker to see how they compare with commercial meals.

Five easy meals to start with

1. Trail chilli: dried mince or beans, peppers, tomato leather, instant rice.
2. Red lentil dal: dried cooked red lentils, onion, spices, coconut milk powder, couscous.
3. Spaghetti bolognese: dried bolognese sauce plus thin quick-cook pasta.
4. Burrito bowl: bean flakes, dried salsa, instant rice, cheese and a tortilla.
5. Thai peanut noodles: rice noodles, dried vegetables, peanut powder, soy sauce packets.

For more recipes, see easy backpacking recipes and homemade hiking meals. Comparing your own meals with store-bought? Read freeze-dried vs dehydrated meals.

Sources: USDA Food Safety and Inspection Service: Jerky and food safety, for meat temperatures; National Center for Home Food Preservation: Drying, for fruit and vegetable drying; nutrition values from USDA FoodData Central.