Ingredients

• Yogurt3 tbsp
• Milk2 1/2 cups
• Milk powder2 tbsp

Steps

1. 1. Fill a very large heatproof bowl with cold water and ice.
2. 2. Combine milk and milk powder in a small pot and stir to combine over a medium heat. Use a thermometer to bring the milk mixture to 90C and keep it at this temperature for a few minutes.
3. 3. Take pot off heat and place in the large bowl and stir. Use the thermometer to monitor the temperature. Once the temperature is brought down to 45C, remove the pot from the bowl and stir in the yoghurt until combined. Pour into a sealed flask, leaving untouched for at least 6 hours.