Making your own self-raising flour is easy - all you need is plain flour (all-purpose flour) and baking powder. It's a handy backup if you ever run out of self-raising flour while baking.

This recipe is part of my Thermomix pantry basics series. In this collection, I share simple ways to save money and time by making everyday staples in the Thermomix - like turning regular white sugar into icing sugar.
DIY Self-Raising Flour Tips
Ratio: Use 1 teaspoon of baking powder for every 100 g of plain flour.
Ensure Your Baking Powder Is Fresh: If the baking powder is past its use-by date, your cakes and muffins won't rise properly. To check if it's still active, try this quick test:
- Boil some water.
- Place ½ a teaspoon of baking powder into a small ramekin or mug.
- Pour in about 100ml of the hot water.
- If it fizzes and bubbles energetically, it's active, if it does nothing or fizzes weakly, it's time to replace it.
Storage
Transfer the flour to an airtight container and store it in a cool, dark pantry for up to 6 months.
⭐️ Did you make this Self-Raising Flour? I'd love to hear what you think - please leave a comment and recipe rating below! You can also subscribe to my email list to never miss a new Thermomix recipe.
📖 Recipe

How to Make Self-Raising Flour in the Thermomix
Ingredients
- 200 g plain four, (all-purpose flour)
- 2 teaspoon baking powder, see notes
Instructions
- Add the plain flour and baking powder to the Thermomix bowl.
- Mix for 10 sec/speed 5.
- Transfer the flour to an airtight container and store it in a cool, dark pantry for up to 6 months.
Notes
⭐️ Top Tip
Ensure Your Baking Powder Is Fresh: If the baking powder is past its use-by date, your cakes and muffins won't rise properly. To check if it's still active, try this quick test:- Boil some water.
- Place ½ a teaspoon of baking powder into a small ramekin or mug.
- Pour in about 100ml of the hot water.
- If it fizzes and bubbles energetically, it's active, if it does nothing or fizzes weakly, it's time to replace it.
Comments
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