Thermomix sourdough
Thermomix Sourdough

Thermomix Sourdough: Make Real Sourdough Bread in Your Thermomix

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Thermomix sourdough could not be easier!

No matter which Thermomix model you own, this guide to making real sourdough bread in your Thermomix will see you baking a successful loaf every single time!

Thermomix Sourdough Bread

When I started my journey into sourdough, I always mixed it by hand – I liked to get a feel for the dough and developing my intuition with each stage. Since starting this blog and my Sourdough Facebook Group I’ve been asked multiple times how to use a Thermomix to make sourdough.

At first I resisted – seriously who wants sticky dough stuck on Thermomix blades, right? But I thought, what the hell, maybe I should try it. And so I have spent several weeks testing out different techniques. I’ve tested this recipe many, many times and it works really well. So in order to help other Thermomix owners enter the world of sourdough, I’ve decided to share this method with you. I’ve even discovered that the blades don’t get that sticky and are quite easily cleaned. Who would have thought?

The dough isn’t actually that sticky once it’s mixed for the right time and it will mostly come away from the blades in one big glob. You can then easily clean the bowl with some warm water and quick blitz on speed 10.

Why Use Your Thermomix to Make Sourdough Bread?

Using your Thermomix means you don’t have to handle the dough really at all until the shaping stage.

This hands off approach won’t suit everyone – and to be honest – I still love to hand mix my dough – but using your Thermomix will:

  • save you time at the beginning of the process;
  • keep your hands clean;
  • allow you to have a more hands off approach.

There are many people who say that there is no need to knead sourdough (haha) and you know what, they are right.

But if you have a Thermomix sitting on the bench, why not use it to your advantage? It will cut down on the time it takes you to produce a loaf of sourdough bread.

Thermomix sourdough bread recipe
Sourdough mixed in the Thermomix – you can make sourdough in any model of Thermomix.

Understand The Process of Making Sourdough Bread

You may have already made sourdough by hand and understand the process.

If you haven’t made sourdough by hand, I highly recommend you reading this beginner’s guide to baking simple sourdough, which will take you through some of the ins and outs of the process, which are still applicable, even though you are making sourdough in your Thermomix.

Whether you use a machine – or your hands – it’s really important to understand why you are doing things and what might happen if things go wrong (and believe me things can go wrong!).

While you are building the sourdough dough in your Thermomix, you will still need to do a bulk ferment, shaping, cold retard and bake the same way as “conventional” sourdough. You’ll find a handy glossary of sourdough terminology here.

The Key to Sourdough Success

The absolute most important thing when baking sourdough is to have a super bubbly, active starter.

If you haven’t created a sourdough starter – you’ll find the simple guide to creating yours here

If you’re having trouble getting your starter to be ready to bake with, check out our troubleshooting guide here.

Having a super active sourdough starter is the very first step in ensuring you get superior oven spring when your sourdough hits the oven. If you are wanting to make your sourdough starter extra sour, you’ll find ideas on how to do that here.

sourdough starter with elastic band to show rise level
You want to use your sourdough starter when it’s at it’s peak activity, usually a few hours after you’ve fed it.

Baking Timeline When Making Thermomix Sourdough

When baking sourdough, it’s important to create your own baking timeline so that you know what needs to happen when. Planning things makes sure you don’t miss a step.

My timeline for Thermomix Sourdough looks something like this – but it’s all negotiable.

6.00 am – Feed sourdough starter
10.00 am – Premix and Autolyse in the Thermomix
10.30 am – Mix dough using dough mode until it forms a smooth ball
11.30 am – Place into glass bowl, cover and leave to bulk ferment
9.00 pm – Shape, lift into banneton/bowl & into the fridge for cold ferment

10.00 am – Bake in hot oven
7.00pm – finally cut into delicious sourdough!

Thermomix Sourdough Hydration Level

I’ve made the hydration of this Thermomix Sourdough Loaf around 78%. It has 380g of water plus 100g of starter (so a total of 430g of water).

The Thermomix handles the higher hydration dough very easily. I’ve added 100g of starter because it does mean that you can ferment this dough a little faster if you need to.

This, together with the faster starter the Thermomix gives you, will allow you bake a loaf somewhat faster than using less starter.

If you prefer to use less starter to increase the sourness of your loaf, you can certainly adjust it to suit your needs.

If you have not made sourdough before – by hand – then I would definitely reduce the water in this recipe a little – so start with 350g and once you’re comfortable handling this, then move up gradually to 380g of water.

A little lower hydration will mean that your dough will be a little easier to handle.

What Equipment Will I Need To Make Thermomix Sourdough Bread?

You can make a successful loaf of sourdough with very basic equipment, as well as your Thermomix of course. However, it really does help to have some specialised equipment. Some of my favourite things to use while baking sourdough bread are:

  • Glass mixing bowl so you can watch all the action unfold – while you mix it in your Thermomix, you’ll still need to ferment your dough in a separate bowl.
  • Banneton – a shaping basket to maintain your dough shape while cold fermenting.
  • Dutch oven to ensure you get the best possible oven spring and crust.

You can visit my Amazon Store for all my fave sourdough equipment here.

What Else Can I Use My Thermomix For When Making Sourdough Bread?

Your Thermomix is not only useful for mixing your dough when baking sourdough bread, it’s also very handy for the following tasks:

  • Kitchen scales when feeding your sourdough starter. You can place your jar on the lid and use it to weigh your flour and water.
  • Grind up your sourdough starter if you dry it to save it as a backup or to give to a friend. Your Thermomix will turn it into a powder which is easier to hydrate.
  • Milling your own flour for baking sourdough. Milling oats, wheat berries and other whole grains is super simple – and it doesn’t get much fresher!
  • Baskets as Bannetons – the basket of your Thermomix makes the perfect banneton for a half size loaf. If you have a few baskets you can split the dough into two pieces and shape two smaller loaves. I love to do two smaller loaves to give as gifts – or to keep a little loaf in the freezer.
Use an old cotton pillow case that has been cut into a square, flour with rice flour and use to line your Thermomix basket. It will hold half of this recipe.

Want to shape your sourdough in a batard rather than a boule? You’ll find instructions here.

Go forth and conquer your sourdough baking and I can’t wait to see your results in our Sourdough for Beginner Bakers group!

If you’re looking for some tips to improve your oven spring when baking sourdough bread, you’ll find 6 tips here.

Want to add some flavors to your sourdough bread? You’ll find the ultimate guide to adding flavors to your sourdough bread here.

Looking for an easy Sourdough Pizza Dough using your Thermomix? Check out this one!

Thermmomix Sourdough Bread Recipe

Thermomix Sourdough

No matter which Thermomix model you own, this guide to making real sourdough bread in your Thermomix will see you baking a successful loaf every single time! Thermomix sourdough could not be easier!
5 from 1 vote
Prep Time 2 hrs
Cook Time 45 mins
Fermentation Time 22 hrs
Course Side Dish
Cuisine American
Servings 1 Loaf
Calories 1896 kcal


  • Thermomix
  • Banneton
  • Dutch Oven


  • 100 g Sourdough Starter fed and bubbly
  • 380 g Water you can reduce the water to 350g if you want a lower hydration dough
  • 500 g Bread Flour Baker's Flour
  • 10 g Salt


  • Add your sourdough starter and water to the TM bowl. Mix speed 3 for 15 seconds.
    Thermomix Sourdough Bread Recipe
  • Add your flour and salt to the sourdough starter and water in the TM bowl. Mix for 20 seconds on Dough mode. Leave the dough in the TM bowl for 30 minutes to 1 hour.
    Thermomix Sourdough Bread
  • Mix the dough for 3 minutes on Dough mode. Leave dough to rest in the bowl for at least 10 minutes (you can leave it up to around 30 minutes if you want to). You don't want the dough to get too warm from mixing.
  • Mix the dough for another 3 minutes on Dough mode. The gluten in your dough will be well formed by now and the dough should be slapping the sides of the bowl. When you look into the bowl, you should see that there is a gap between the dough and the side of the bowl because the dough has formed a "ball". The dough will be elastic when you pull it up and have quite a bit of stretch.
  • Pour the dough into a glass bowl. It should "bounce" out in one big blob if you jiggle the TM bowl upside down. Most if it will come away from the blades in this way. You can use a silicone spatula to get the remaining dough if you need to.
    If there is still a little sticky dough left on the blades, just cover with water and blitz on speed 10 to easily clean the blades. The quicker you do it, the easier they are to clean. A quick zip around with a Thermo brush and you should be good to go!
  • Cover the dough in your bowl with plastic wrap and leave it to bulk ferment. See Notes below for information on this step.
  • Use a silicon spatula to gently ease the dough out of the glass bowl. You want it to land "upside down" with the smooth top of the dough at the bottom and the sticky underneath on the top. This will make it very easy to shape.
    Using your hands, pull the of the dough into the centre so that it starts to form a ball. Once all the edges are in the centre, turn the dough over so that the smooth dough is at the top. Using the sticky underside, gently tension the dough so that it forms a ball.
  • You will need a banneton to put your dough into. If you do not have a banneton, then a bowl or basket lined with a floured tea towel is perfectly fine. Make sure your bowl isn't too big though, you want your dough to retain some shape.
    Whatever you're using needs to be liberally floured with your rice flour. If you're using a banneton – liberally sprinkle it with rice flour. If you're using a cloth or tea towel, rub the flour into it to ensure it becomes non stick.
    Once the dough is shaped into a tight ball, place it into your banneton smooth side down, so your seam is on the top – this way the top of your dough will get the pretty lines from the banneton. If you're using a cloth or tea towel in a bowl it's ok to put your dough with the smooth side up. Just make sure the dough is tight.
    Lift your dough around the edges to pop a little more rice flour if you feel it needs it. Just try to handle the dough as little as possible and be really gentle as you really want to preserve all the gases and air bubbles that have formed during your bulk ferment.
  • Now your dough is in it's "shaping container" cover it loosely with a plastic bag or damp tea towel and place into the fridge. I use a large plastic bag to cover it – I just reuse it each time. It's not totally essential to cover it – you can place it in the fridge uncovered if you'd prefer.
    Try to leave it in the fridge for a minimum 5 hours up to a maximum of around 36 hours. The longer you leave it the better your bread will be! A longer cold ferment creates beautiful blisters on your crust and a deeper sourdough flavour. It will also ensure your dough forms a skin which makes it easier to score.
  • Once you're ready to bake your sourdough, you'll need to preheat your oven to 230C/450F. Place your Dutch Oven into the oven when you turn it on so it gets hot. Try to preheat for around 1 hour to ensure your oven is super hot – but you know your oven so just adjust this time if you need to.
    Leave your dough in the fridge until the very last minute – placing a cold dough into a hot oven will give you a great "spring".
  • Now it's time to bake!
    When your oven is at temperature. Take your sourdough out of the fridge. Gently place it onto a piece of baking paper. Make sure that you make the baking paper big enough to use the edges as a handle to lower to dough into your Dutch Oven.
    Gently score your bread with a lame, clean razor blade or knife. At minimum a large cross is sufficient, but you can get as artistic as you like. Try to score it fairly deep to ensure the dough opens up.
  • Carefully take your dutch oven out of the oven. Place the sourdough into the pot using the baking paper as a handle. Put the lid on and place into the hot oven. If you want to you can spritz your dough with extra water before you put the lid on.
    If you're worried about the base of your bread burning, place a baking sheet on shelf underneath your Dutch Oven – it works!
    Bake your sourdough for 30 minutes with the lid on at 230C/450F plus
    10 minutes with the lid off at 210C/
  • When you remove your dough from the oven, carefully remove it from the dutch oven as soon as possible and place on a wire rack to cool.


Notes on Bulk Fermentation –
The time you need to bulk ferment will depend on the temperature in your home. This recipe has 100g of starter so will ferment at a good rate. You can leave it overnight, but you’d need to have a cool home, so under 18 degrees. You don’t want it to go over while you’re sleeping. You can read more about how the amount of starter affects your sourdough here.
Your dough is ready to move onto the next stage when it’s doubled in size, slightly domed on top and is full of bubbles. It will be soft and pillowy and NOT sticky on top! You can read more about bulk fermentation here.


Calories: 1896kcalCarbohydrates: 382gProtein: 63gFat: 9gSaturated Fat: 1gSodium: 3906mgPotassium: 501mgFiber: 13gSugar: 2gVitamin A: 10IUCalcium: 89mgIron: 5mg
Keyword Sourdough Bread, Sourdough Recipes, Thermomix Sourdough
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