Wonderbag Review – A Revolutionary, Environmentally Friendly Slow Cooker (Plus A Simple Curry Recipe!)

Curry made with Wonderbag

Why I need a slow cooker

I never had a slow cooker before, as I’m being vegetarian we don’t really make meaty stews at home. So I was a little bit reluctant as I thought: I don’t really need one, do I? However, I’ve heard many people use their slow cooker for preparing veggie meals too and so I had a little search. Turns out, there are a whole range of meals you can make in a slow cooker. Curries, veggie stews, soups, even veggie enchilada and child sin carne. I’m up for everything which saves time and I like the idea of cooking everything in the same pot. Especially for hearty, wintery meals.


What is Wonderbag?

I came across Wonderbag not long ago when I was looking for slow cookers. Never heard about it before, but Wonderbag is the award winning eco-friendly slow cooker that uses heat-retention to cook your food. What it does is, after bringing the food to boil, simmering for a few minutes, then placing into the Wonderbag, then the Wonderbag will continue the cooking process. Without using any energy, it cooks evenly and consistently, no supervision needed. It is a highly efficient and energy saving way of cooking, thanks to the special technology Wonderbag uses. It saves money and time, because after reaching the boiling point and the pot is placed into the Wonderbag, you can even leave home to explore the outdoors and later return to a fully cooked, fresh and healthy meal. 

Use it both indoors and outdoors

Apart from its price being the same as a regular slow cooker (if not a little cheaper), has the advantage further money saved on the energy. It’s also portable, wich makes it perfect for outdoor use. In fact, camping (don’t forget your puffy camping blankets!), clamping, picnics but even serious outdoor adventurers like professional mountain climbers could use Wonderbag. It’s of course very lightweight and can be squashed down, therefore it takes up less space.

What I liked about it

  • Setting up the bag and cooking with it was very easy
  • It also came with a recipe book full of great ideas and recipes
  • It helps to keep ready meals warm without using extra electricity. If dinner is delayed for some reason (because a family member stuck on a delayed train heading out from Waterloo station…) just put it in the Wonderbag to keep the meal warm. No need heating the dinner up again
  • The cooking time in the Wonderbag can be 1-2 hours more than in the stove, but that’s time saved not spending it in the kitchen
  • In summer there will be no overheated kitchen

Buy 1, donate 1

Sarah, the founder of Wonderbag has created it because she grew up in rural Africa and she always wanted to do something to empower women living in very poor conditions. Because Wonderbag needs no energy, no plug, most importantly it saves money. Furthermore, reducing time spent cooking and collecting firewood frees up time for other important jobs and education. Finally, it also means less wood being burnt and therefore less toxic fumes being inhaled. The company’s ethical approach is very straight forward. For each large Wonderbag purchased the Wonderbag Foundation donates another one to a family in Africa.

Recipe: curried sweet potato and brown lentils with mushrooms

Now, onto my Wonderbag recipe. I have prepared a very easy curry, using brown lentils, sweet potato and mushrooms. Please see the recipe below. The cooking time may vary for different pans, but it took about an hour and a half for me using my cast iron casserole dish. If you’d like to try another veggie curry, why not check out this recipe: Vegan Paneer And Butternut Squash Curry

Wonderbag curry

Curried sweet potato and brown lentils

5 from 3 votes
curried sweet potato
Curried Sweet Potato And Brown Lentils With Mushrooms
Prep Time
15 mins
Cook Time
45 mins
Soaking the lentils
1 hr 30 mins
Total Time
1 hr

This is an easy meal, naturally vegan, but full of flavours. Fantastic comfort food for the cold months and you can make as hot or mild as you wish. Serve it with basmati rice or naan bread.

Course: Main Course
Cuisine: Indian
Servings: 4 people
  • 1 medium sweet potato cubed
  • 160 gram brown lentils washed and soaked
  • 4 shallots finely sliced
  • 130 gram chestnut mushrooms washed and halved
  • 1 can chopped tomato
  • 1 can coconut milk
  • 2 tsp ground ginger
  • 0.5 tsp turmeric
  • 0.5 tsp garam masala
  • 2 tsp medium curry
  1. Wash and soak the lentils for about an hour and a half.

  2. Chop up all the vegetables. If the mushrooms are large, cut them into quarters.

  3. In a large casserole pan, on low temperature, heat the tomato, the coconut milk with all the spices, stir them frequently while bringing them to boil. 

  4. Tip in all the chopped vegetables and bring it to boil on medium heat.

  5. Turn the heat down then cook it for another 45 minutes or remove the pan from the heat put it into a Wonderbag and after closing the bag let it be for another hour and a half.

  6. Serve it with basmati rice or naan bread.

Recipe Notes

I was sent this Wonderbag in exchange for my honest review. I absolutely enjoyed using it, it’s easy, makes no mess, saves time and energy. 

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Micaela Levachyov March 14, 2018 - 9:16 am

This is such a great idea for saving energy. I love the idea of using while camping or cooking outside in summer.

eva.katona@yahoo.com March 14, 2018 - 8:37 pm

Its a brilliant idea. Saves money and energy.

Nicolette Lafonseca March 14, 2018 - 11:31 am

Thus seems like sorcery it amazes me how in a world with so much in people are still inventing things that blow my mind

eva.katona@yahoo.com March 14, 2018 - 8:37 pm

I know right?

Whatlauraloves March 14, 2018 - 10:04 pm

I absolutely LOVE my slow cooker. I batch cook and I’m always full of busy so its great for me to be able to head out the door on a morning and know that theres a hot meal waiting for me when I get back home xxx

eva.katona@yahoo.com March 15, 2018 - 10:14 am

Yes, that’s the idea. Now I can do this to. How could I have possibly lived without this so far?

Kara March 15, 2018 - 8:17 am

I have not heard of wonderbag before but it sounds like an ingenious idea. The curried sweet potato sounds delicious too

eva.katona@yahoo.com March 15, 2018 - 10:13 am

Such an innovative idea, isn’t it?

Rhian Westbury March 15, 2018 - 10:04 am

I’ve had a slow cooker for a while but I’ve barely utilized it, so I definitely need to especially with great recipes like this x

eva.katona@yahoo.com March 15, 2018 - 10:12 am

I was honestly surprised how useful it is for cooking veggies too.

AnnMarie John March 15, 2018 - 11:54 am

5 stars
This is amazing! It’s the first time I’ve come across a slow cooker like this and I love that you can take it with you wherever you go. It’s perfect for cooking while you’re outdoors. Definitely something that I’d get!

Tracy Albiero March 15, 2018 - 11:59 am

Ohhhhh fun recipes. Need to try them! #coolmumclub

emma white March 15, 2018 - 12:20 pm

oh I just love my slow cooker too I am so going to have to give this a try for myself it looks and sounds ideal for these cold dark nights

eva.katona@yahoo.com March 15, 2018 - 9:43 pm

Or even in summer – no more overheated kitchen.

Talya March 15, 2018 - 1:02 pm

I’ve never heard of this before but love the fact it can also be used for outdoor cooking too – it sounds really useful! Thanks for linking up to #coolmumclub x

Danielle March 15, 2018 - 5:11 pm

I saw these online recently and I am going to have to get one for our next camping trip. So good for festivals too.

eva.katona@yahoo.com March 15, 2018 - 9:42 pm

Yup, even for festivals!

Candice Nikeia March 15, 2018 - 7:21 pm

I have always wanted a slow cooker and I think this article is just what I needed to convince myself to get one! I want to make this meal today!!

eva.katona@yahoo.com March 15, 2018 - 9:41 pm

Oh you should! It’s so easy to use too.

anosa March 15, 2018 - 7:52 pm

5 stars
the future really is here! an environmentally friendly slow cooker! this is amazing. i love the concept and the purpose. i have to have one!

eva.katona@yahoo.com March 15, 2018 - 9:40 pm

These were my exact thought when I first came across Wonderbag.

Jenni March 16, 2018 - 12:41 am

Wow, that is absolute genius! I need one of these in my life. The curry looks incredible too x

Alice | Letters to my Daughter March 16, 2018 - 10:43 am

Wow, what a cool invention! And that recipe looks absolutely delicious. We’re trying vegamisn for a month so looking out for tasty recipes to try! #coolmumclub

eva.katona@yahoo.com March 19, 2018 - 9:15 pm

Ohh sound great, good luck xx

Kristina March 20, 2018 - 9:35 am

5 stars
This looks so delicious I need to try and make it this week!! 🙂

amandajay281 June 10, 2018 - 7:27 am

I love making chicken chasseur in the slow cooker x


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