- STEP 1
Line a 22cm square non-stick tin with baking parchment. Put the caster sugar, double cream and liquid glucose in a pan. Slowly heat together, stirring continually, until the sugar melts and stops feeling grainy on the bottom of the pan. Turn up the heat and fast boil until a small amount of the mixture dropped into a glass of cold water sets into a soft ball that you can pick up on a teaspoon. By this time the bubbles in the mixture will look small and even.
- STEP 2
Turn off the heat and keep stirring for 5 mins or until the mix starts to thicken a little. Sprinkle in the white chocolate and swirl it through the mixture once using a spatula or the handle of a wooden spoon. Pour into a tin and leave the fudge overnight to set, then turn out and cut into squares. Will keep for up to 2 months in an airtight container – don't store in the fridge or the fudge will go soft.