cook beans thermos

Save Time and Energy: How to Cook Beans in a Thermos Like a Pro

Beans are a nutritious and versatile food that can be included in many delicious dishes. However, cooking beans can be time-consuming and energy-intensive. Have you ever considered cooking beans in a thermos? This unconventional method can save time, energy, and money. In this article, we will explore the advantages of using a thermos to cook beans, discuss what thermos is best for the job, and provide you with a step-by-step guide to cooking beans in a thermos.

Advantages of Cooking Beans in a Thermos

  1. Energy-efficient: Cooking beans in a thermos requires less energy than traditional methods, such as using a stovetop or slow cooker.
  2. Time-saving: Once you’ve prepared the beans and poured boiling water into the thermos, you can leave them to cook without having to monitor the progress.
  3. Portable: You can take your thermos with you and have a hot, nutritious meal ready to eat, even when you’re on the go or camping.
  4. Retains nutrients: The slow and gentle cooking process helps to preserve the nutritional value of the beans.

Can You Cook Beans in a Thermos?

Yes, you can cook beans in a thermos! The thermos acts as an insulated container that retains heat, allowing the beans to cook slowly over an extended period. This method works best for smaller beans such as lentils, split peas, and black-eyed peas. However, with a few adjustments, it can also work for larger beans like kidney beans or chickpeas.

What Thermos is The Best for Cooking Beans?

A high-quality, vacuum-insulated stainless steel thermos with a wide mouth is the best choice for cooking beans. Ensure that the thermos has a tight-sealing lid to maintain the heat and pressure inside. A thermos with a capacity of at least 1.0 liter is recommended to cook a substantial amount of beans.

Ingredients and Equipment

  • 1 cup of dry beans (such as lentils, split peas, black-eyed peas, or pre-soaked kidney beans or chickpeas)
  • 3-4 cups of boiling water
  • 1 teaspoon of salt (optional)
  • Aromatics or spices (such as garlic, onion, bay leaves, or cumin)
  • A high-quality, vacuum-insulated stainless steel thermos with a tight-sealing lid (minimum 1.0-liter capacity)
  • A strainer or colander
  • A pot to boil water

Step-by-Step Process of Cooking Beans in a Thermos

  1. Rinse and soak the beans: If you’re using larger beans like kidney beans or chickpeas, rinse them thoroughly and soak them in water for at least 8 hours or overnight. Smaller beans like lentils and split peas do not require pre-soaking.
  2. Drain and rinse the beans: Drain the soaked beans and rinse them thoroughly. If you’re using smaller beans, simply rinse them before adding them to the thermos.
  3. Prepare the thermos: Preheat your thermos by filling it with boiling water. Let it sit for a few minutes, then pour out the water.
  4. Add the beans to the thermos: Place the rinsed beans into the preheated thermos. Add any desired aromatics or spices at this stage.
  5. Add boiling water: Boil 3-4 cups of water, then carefully pour the boiling water into the thermos, covering the beans by at least an inch. Add salt if desired.
  6. Seal the thermos: Place the lid on the thermos and ensure it’s tightly sealed.
  7. Cook the beans: Allow the beans to cook in the thermos for 8-12 hours. Smaller beans will typically cook faster, while larger beans may take longer.
  8. Drain and serve: After the beans have cooked, carefully open the thermos and drain the beans using a strainer or colander. Serve as desired.

Serving Suggestions and Tips

  • Beans cooked in a thermos can be used in salads, soups, stews, or as a side dish.
  • For added flavor, saute onions, garlic, and spices in a pan before adding them to the thermoswith the beans.
  • You can also add a piece of kombu seaweed to the thermos to help soften the beans and make them more digestible.
  • If you find that the beans are not fully cooked after the initial cooking time, you can pour the contents of the thermos into a pot and finish cooking them on the stovetop.
  • To store any leftover beans, transfer them to an airtight container and refrigerate for up to 5 days.


Cooking beans in a thermos is an innovative and energy-efficient method that can save time and money. It’s perfect for those looking for a more sustainable way to prepare their meals. By following the step-by-step process outlined in this article, you’ll be able to cook beans in a thermos with ease. Give it a try and enjoy the numerous benefits of this unique cooking technique.

As you can see, cooking with a thermos is a great way to save time, energy, and money while enjoying delicious and nutritious meals. But beans are not the only food you can cook in a thermos. You can also try other grains, legumes, and even eggs. Here are some other articles that will show you how to cook rice, eggs, pasta, and quinoa in a thermos. Just click on the links below and discover the amazing possibilities of thermos cooking.

  • Cook Rice in a Thermos: Ultimate Guide and Tips
  • How to Cook Eggs in a Thermos: A Step-by-Step Guide for Tasty, Easy Breakfasts
  • How to Cook Pasta in a Thermos: A Comprehensive Guide
  • How to Cook Quinoa in a Thermos: The Ultimate Step-by-Step Guide

We hope you enjoyed this article and learned something new about thermos cooking. If you have any questions or comments, feel free to leave them below. Happy cooking!

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