How to Cold Soak: The Complete Guide to No-Cook Backpacking Meals

A stove, a fuel canister, a pot, a lighter, and the time it takes to set it all up is roughly 16-24 ounces of pack weight and 20-30 minutes per meal. For many backpackers — especially thru-hikers and high-mileage weekend warriors — that’s a meaningful chunk of base weight and trail time.

Cold soaking is the alternative: pre-soaked food in a sealed jar that hydrates while you hike. No flame, no cleanup, no fuel. The trade-offs are real (cold food isn’t always satisfying, and not all foods work), but for the right person on the right trip, cold soaking is a legitimate weight-savings strategy.

Here’s exactly how to do it.

What Is Cold Soaking?

Cold soaking is rehydrating dried food in cold water over time, typically 1-4 hours. Your foot acts as the heat source — body warmth from your hip belt or chest pocket helps, but mostly you’re relying on time. Foods that absorb water quickly (pasta, instant rice, couscous, oats) work well. Foods that need heat to denature proteins or break down starches (dried beans, lentils, raw rice) do not.

What You Need

The entire cold soak kit is one jar:

The container — a wide-mouth, leak-proof plastic jar with a screw lid. The cult favorite is the Talenti gelato jar — 16 oz, free with your first ice cream, BPA-free, leak-proof, exact right size for one meal. Other options: Vargo Bot, Nalgene wide-mouth, peanut butter jars (cleaned), or any food-grade container that seals.

That’s it. No stove, no pot, no fuel, no lighter, no pot grippers, no fuel canister to dispose of.

Optional: A long-handled spork to reach the jar bottom and a small piece of bandana for cleaning.

How Long to Soak

Most cold-soak-friendly foods are ready in 30 minutes to 2 hours. Standard timing:

Strategy: start the soak when you take a snack break. By the time you’ve hiked another hour or two, lunch or dinner is ready.

What to Soak: The Cold Soak Menu

The trick is choosing foods that hydrate without heat. Here are field-tested categories:

Carb bases (the foundation)

• Idahoan instant mashed potatoes — gold standard. Soaks in 10 minutes, calorie-dense, salty.
• Israeli/pearl couscous — soaks in 15-20 minutes.
• Quick-cooking ramen (broken up before soaking)
• Instant rice (the kind that says “ready in 10 minutes” — regular rice doesn’t work)
• Quick oats (not steel cut — steel cut needs heat)
• Stove Top stuffing — works surprisingly well, salty, packs flavor

Protein additions

• Starkist tuna packets — already cooked, add directly
• Chicken packets — same
• Salami/summer sausage (sliced)
• Hard cheese (parmesan, hard cheddar)
• Powdered hummus (Cedar’s or generic) — soaks with the carb
• Dried/cured meats — pepperoni, jerky
• Powdered milk + protein powder for breakfast carb bases

Flavor boosters

• Olive oil in a leak-proof bottle (caloric punch + helps cold food slide down)
• Cholula mini hot sauce bottles or Tabasco packets
• Soy sauce packets
• Mayo packets for tuna/chicken bases
• Dried herbs (basil, oregano, garlic powder)
• Nutritional yeast for cheesy umami
• Crushed Fritos or tortilla chips — adds crunch and salt to bean/cheese meals

Dehydrated extras

• Dehydrated vegetables (commercial or home-dehydrated)
• Dehydrated refried beans (Santa Fe Bean Co. or similar)
• Sun-dried tomatoes

Sample Meals That Actually Work

Breakfast: Mountain Oats

• 1/2 cup quick oats
• 1 tbsp peanut butter
• 1 tbsp brown sugar
• Handful of dried fruit
• Splash of powdered milk
• Cold water to cover

Soak 15 minutes. Hike. Eat. ~500 kcal, fast and satisfying.

Lunch: Pizza Wrap

• 1 packet tuna
• 1 small packet mayo
• Tortilla
• Hard cheese
• Hot sauce packet

No soak needed. Eat the tuna mixed with mayo on the tortilla. Faster than any “meal” preparation.

Dinner: Cold-Soak Loaded Mashed Potatoes

• 1 pouch Idahoan mashed potatoes
• 1 tbsp olive oil
• 1 packet chicken
• 2 tbsp powdered milk or parmesan
• Dehydrated chives, hot sauce, salt

Pour water to just cover, seal jar, shake. 10 minutes. ~700 kcal of warm-feeling comfort food (the chicken pouch has been heated by your body in the pack — feels less “cold”).

Dinner: Cold-Soak Burrito Bowl

• Instant refried beans
• Instant rice
• Hot sauce
• Crushed Fritos
• Hard cheese
• Salami

Soak the rice and beans separately (rice 45 min, beans 30). Combine. Top with Fritos and cheese. ~800 kcal.

What NOT to Cold Soak

These foods will be unpleasant or unsafe cold-soaked:

• Dehydrated commercial meals (Mountain House, Backpacker’s Pantry) — the freeze-dried proteins and rice need the energy of heat to fully reconstitute. Cold-soaked Mountain House is chewy and weird.
• Pasta (regular) — angel hair pasta CAN cold soak (it’s thin enough), but most pasta needs heat to gelatinize the starches properly. Cold-soaked spaghetti is rubbery.
• Dried beans — kidney, pinto, black, garbanzo. These need heat to break down phytic acid and lectin compounds. Eating undercooked beans causes GI distress. (Instant refried bean flakes are different — they’ve been pre-cooked then dehydrated.)
• Raw rice — same issue. Regular long-grain rice does not soften enough cold.
• Eggs — food safety concern; don’t cold-soak any egg product.
• Raw lentils — need heat.

The Trade-offs (Be Honest With Yourself)

Cold soaking is great for:

• Long-mileage days where stove time costs miles
• Hot summer trips where hot food sounds awful
• Hikers prioritizing minimum base weight (saves 1-2 lbs)
• People who eat-and-move efficiency-style
• Anyone who’s tired of stove cleanup

Cold soaking is not great for:

• Cold-weather trips below ~50°F nights — you actually want hot food for morale and core warmth
• Anyone who looks forward to dinner as the highlight of their day
• Snow camping (heat helps body recovery)
• Hunters / hard-effort cold-weather trips where calories-as-warmth matters
• Group meals where social food prep matters

A reasonable middle path many backpackers settle into: cold soak lunches and snacks, cook breakfast and dinner. This saves significant fuel and time without giving up the comfort of hot meals.

Practical Tips We’ve Learned The Hard Way

Carry the jar in your pack’s hip-belt pocket for active warming. Your body heat speeds soak time noticeably — a “30 minute” soak in a hip pocket can be done in 20.

Pre-portion meals at home into Ziploc bags. Pour into the jar, add water, shake. Way faster than measuring on trail.

Salt your water at home. Add salt to your dry meal portions before packing — meals taste flat if you forget salt.

The jar smells. After a few meals, even washed, the Talenti jar holds onto food smells. This is a problem if you camp in bear country — store the jar with the rest of your food, not in your tent.

Olive oil is the calorie multiplier. A few backpacker tablespoons of olive oil per day adds significant calories without taking up volume. Cold soak meals can feel “thin” without added fat — olive oil fixes this.

Soak overnight for breakfast. Heavy-soak meals like steel cut oats DON’T work cold, but adding water to instant oats the night before means breakfast is ready when you wake up. Pack it tight in the jar, don’t let it freeze.

Clean with cold water and a bandana. No soap on trail (LNT). The jar will smell, the bandana will smell. Both are tolerable.

The Bottom Line

Cold soaking isn’t for everyone, but it’s a legitimate UL strategy. The savings are real:

• Weight: ~1.0-1.5 lbs (stove + pot + fuel + lighter + pot grip)
• Time: ~20 minutes per meal × 2 meals/day = 40+ minutes back per day
• Fuel cost: ~$5-10 per week of canisters
• Trash: No empty fuel canisters

For a thru-hiker, that’s 1.5 lbs of base weight saved and 40 minutes of trail time gained per day. For a weekend warrior on a clear-weather summer trip, it’s a way to drop your kit complexity. For shoulder-season alpine trips, it’s a bad idea — bring the stove.

Try it on a single overnight before committing. Pack a stove backup. After 3-4 cold-soak trips you’ll know whether it’s your style or not.

Pack light. Eat well. Stay out longer.