To start the bug, place 100g finely chopped carrot or beetroot, 10–15g chopped ginger, 2 tsp brown sugar, and 200ml filtered water into a sterilised 1-litre jar. Stir until the sugar dissolves, cover loosely with a clean cloth or lid, and label with the start date.
Feed the bug daily for the next five days by adding 10–15g finely chopped ginger and 1 tsp brown sugar each day, stirring thoroughly after each addition. This daily feeding keeps the beneficial bacteria and wild yeasts alive and encourages fermentation. You should begin to notice gentle bubbling and a sweet, slightly yeasty aroma after a few days — a good sign that it’s becoming active.
Open the jar once a day to release gas and prevent pressure building up. After five days, the bug should smell pleasantly yeasty and slightly sweet, with visible bubbles rising to the surface. At this stage, it’s ready to use in homemade sodas.
Once active, store your bug in the fridge with a loose-fitting lid. Feed it once a week with 10g chopped carrot or beetroot and 1 tsp sugar to keep it healthy. To reactivate the bug before using it again, leave it at room temperature and feed daily for one to two days until bubbly.
To make the Immunity Soda, combine 300ml fresh carrot juice, 150ml ginger tea or juice, the juice of one lemon, and 1½ tbsp maple syrup in a large jug. Stir well to mix. Add 50ml of your active carrot or beetroot bug, then top up with 500ml filtered still or sparkling water, stirring gently to combine.
Pour the mixture into swing-top bottles or jars with tight-fitting lids, leaving about 3cm of headspace at the top. Leave the bottles at room temperature for 24–48 hours to naturally carbonate, “burping” them daily to release excess pressure.
Once the soda is bubbly and lightly fizzy, transfer it to the fridge to slow the fermentation. Serve chilled over ice for a refreshing, probiotic-rich Immunity Soda that’s full of life and flavour.