Step 1

Preheat the oven to 120°C (250°F).

Step 2

Cover a baking tray with tin foil (aluminium foil). Spread an even layer of baking soda over the foil.

Step 3

Put the tray into the preheated oven. Bake for 1 hour.

Step 4

Leave to cool naturally then transfer to an airtight container (see note 1).

Step 5

When needed, mix 1 part of baked baking soda with 4 parts of water (see note 2). Use the solution in recipes for your desired dishes.