Step 1

Preheat oven to 250°F (120°C).

Step 2

Spread one cup of baking soda onto a baking tray lined with aluminum foil or baking/parchment paper.

Step 3

Bake the baking soda for 1 hour.

Step 4

Remove the baking soda from the oven and when cooled, store in an airtight container and store indefinitely.Be careful and do not use your bare hands when handling the baked baking soda or it may irritate your skin