How To Use A Thermal Cooker

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Have you wondered how to use a thermal cooker to make meals? Do you know what a thermal cooker is by chance? It’s basically a slow cooker using zero electricity after you bring the recipe to the main pot to a boil for four FULL minutes.

The next thing you do is quickly place the lid on the inner pan (that’s boiling) and place it in the sturdy thermal cooker and lock the lid in place. I wish every family had one of these to use for hot dishes and cold dishes. I bought mine about four years ago and love it to make meals for vacations or take something to the park to eat.

The first time I saw this thermal cooker was on my friend, Julene’s blog. She and I taught classes together occasionally in a store in Salt Lake City, Utah. I bought my thermal cooker and emailed Amy Loveless (Jack’s wife) from Saratoga Jack’s thermal cookers about some questions I had about using one.

She ended up calling me and she told me all the ways she was using it to make meals for her family vacations and so much more. I prefer the larger one because I like how easy it is to lock the lid in place.

I have the large 7-liter model Saratoga Jacks 7L and the smaller 5.5-liter unit too. It has four pieces, the outer thermal cooker, the inner stainless steel cooking pan, a smaller pan, and the lid.

The smaller pan (sits on top of the lower pan) is for cooking small items on top of the larger pan at the same time as you cook the main meal. It looks like Saratoga Jacks isn’t selling these anymore, but they have similar ones on Amazon like this one: Thermos Thermal Cooker

Thermal Cooker

If we were to lose power you could use a butane stove to fry the meat and onions until browned. You could also fry the meat in the main stainless steel inner pan, but I did this so you could see that the meat is cooked before I added it to the pot.

Read More of My Articles  20 Homemade Salad Dressings

I highly recommend a butane stove for emergencies: Camp Chef Butane 1 Burner Stove with Camping Case and please get some canisters: 12 Butane Fuel GasOne Canisters for Portable Camping Stoves

thermal cookers

I started with one pound of sausage (Jimmy Dean) and one chopped onion. I cooked the meat and onion with a little salt and pepper.

thermal cookers

I scooped the cooked meat and onions into the stainless steel inner pan and added two jars of spaghetti sauce (23 ounces each) with one package of uncooked pasta (17.6 ounces). I could see I needed more liquid so I added one more 23-ounce jar of spaghetti sauce.

thermal cookers

Boil For 4 Minutes

I stirred the mixture to evenly distribute the sausage, onions, uncooked pasta, and the three jars of spaghetti sauce. I then stirred the mixture non-stop to keep it from burning and to get it up to the full boil needed.

Once it was boiling I set my timer for four full minutes. After four minutes, I quickly put the pan inside the thermal cooker and placed the lid on the pan, and locked the thermal cooker in place.

No Electricity

I was headed to my friend’s house at 11:30 A.M. so I left the thermal cooker to slow cook my dinner. No electricity, just sitting on the counter.

thermal cookers

The outside is cool to the touch and you don’t have the smell of dinner cooking if you were to take this in your car to cook as you drive 4-6 hours. This is truly a dream for vacations or sporting events.

The dinner cooks as you drive or sit on a blanket at the park. I arrived home at 4:00 P.M. and I opened the lid to take pictures, and dinner was ready to serve. I made a tossed salad and some French Bread! French Bread 

Read More of My Articles  7 Ways To Cook When You Lose Power

I always use my cheese grater to sprinkle some cheese on top of my pasta. Here is my favorite grater: Zyliss Classic Rotary Cheese Grater It was hot and ready to eat, but I could have kept it cooking for another hour or two.

Thermal Cooker

You have to remember, when making dinner in one of these it’s like it’s cooked in a slow cooker. It’s more like a casserole, but who cares if you are at a game and take some paper plates and forks to the park or sporting event? It sure beats takeout food!

One other great thing about these thermal cookers is the fact that you can put a cold salad (dressing in a separate container) inside the inner stainless steel pan with the lid overnight in the refrigerator and the next morning put the pan in the thermal cooker and close the lid. You can go to a family reunion and It will keep your salad cold for 6-8 hours.

Final Word

I love the fact that a thermal cooker can be used if the power goes out if you have a way to bring the contents to a boil for 4 minutes. Please think of it as a slow cooker without using power. Thanks again for preparing for the unexpected. May God bless you in your efforts to be prepared! Linda

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  1. Wow! That is a cool gadget! It would be great for our hot humid summers. And for camping trips! Adding this to the Want List for sure!
    Thanks so much Linda!

    1. HI Melanie, I wish all my daughters had one when going to soccer games, etc. Life is hectic and this would save them time when going to the park, etc. I hope you get one!! Linda

  2. I have three thermal cookers, made by Thermos, in three sizes. The largest is about the size of a standard crock pot. the other two are smaller, and smaller still. The smallest is perfect for cooking a cup or two of rice. They are stainless steel, double wall, and vacuum insulated. If you heat the food to 212 degrees in the evening, the contents will be about 185 degrees the next morning. I use them just like a crock pot, except no electricity is necessary. Perfect for fork-tender pot roasts, stews and chili. Anything you would cook with a crock pot. For some reason that I don’t understand, no one sells Thermos brand thermal cookers in the U.S.. But, you can order them directly from Japan over the internet. Apparently, they are very popular there. They are a bit expensive, but very high quality.

    1. Hi Andy, I love hearing you have three thermal cookers, that’s awesome! I put a link in my post where people can buy a Thermos Thermal cooker from Amazon. They are awesome to have, I need to look for a small one to cook a cup or two of rice! Love it! Linda

  3. I love my thermal cooker. It is great when taking a meal to someone’s house, just grab and go. It is easy to use, and very functional.

  4. Hi Linda,
    You are the one who put me on to thermal cooking when I read your book, along with the butane stove and a dozen other excellent suggestions. It’s amazing that more people don’t know about these, but I have such an interest in other types of cooking that when you mentioned it in your book I went right out and purchased it. As we speak or should I say write, I have chicken stew in my thermal cooker. I use mine quite often. Linda, the recent articles have been so on-target. Informative, helpful and very interesting. I always come away with something. Hugs, Marcia

    1. Hi Marcia, you just made my day!! Thank you so much for your kind words. Marcia, we really do need to have other sources of cooking devices. Don’t you love having dinner cooking (without electricity) then you can let it do the cooking!! I love it!! I’m so glad you bought one, we will be so happy when the power goes out and we NEED one. Keep prepping, girlfriend! Hugs, Linda

    1. Hi Leeanne, oh how exciting. She will love using her thermal cooker. Does she have a way to bring the vegetables to a boil for 4 minutes before placing them in the thermal cooker? It’s so easy! Linda

  5. Yes she has cooking facilities. Looking more for dishes than just vegetables. She is a competent cook but just wanting recipes she can use in the thermal pot. Also cooking beans – kidney beans more specifically, is it ok?

    1. Hi Leanne, cooking beans will be tough. Unless they are already cooked. It would be impossible to cook dry beans in a thermal cooker. I would direct her to for recipes. I love mine for taking to ball games and family reunions, as well as vacations. I start the 4 minute boil and let it cook any recipe (not hard dry beans) so it’s ready when we get to our destination. Linda

  6. Beans and other legumes and grains cook very well in a thermal cooker. For recipes and in depth user information I recommend a book Authored by Cindy Miller titled Let’ s Make Sense of thermal cooking cookbook. You can buy the book at

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