Make Your Own Washing Soda

Step 1

Spread four cups baking soda out onto a cookie sheet in an even layer.

Step 2

Preheat your oven to 400°F, then bake the baking soda for 1 hour. The heat of the oven will cook water and carbon dioxide off of the sodium bicarbonate, leaving sodium carbonate (AKA washing soda) behind!

Step 3

Allow the washing soda to cool after baking it, then transfer it to an airtight container for storage. If you compare your homemade washing soda with baking soda side by side, you’ll notice the washing soda feels a bit grainy compared to the silky smooth baking soda.