Weigh the dry ingredients. Small quantities of less than 1 g should be weighed using a fine scale. If any of the ingredients have become lumpy, pass them through a sieve.
64 g dextrose, 38 g dry glucose, 34 g skimmed milk powder, 76 g cane sugar, 1 g locust bean gum, 1 g guar gum, 1 pinch of salt
Mix the dry ingredients well.
Place all the liquid ingredients in a saucepan and heat the mixture over a medium heat, stirring constantly.
420 g milk, 60 g cream, 150 g mascarpone
Add the dry ingredients to the milk-cream-mascarpone mixture, stirring constantly.
Keep stirring the ice cream mixture for a few minutes until just before it boils. Turn off the hob and remove the pan from the heat.
Leave the ice cream mixture to mature in the fridge for at least 1 hour or overnight.