Mix the sugar and butter with the butterfly blade in the food processor until smooth.
Add the powdered milk, yoghurt powder, flour, corn starch and sea salt and mix further.
Spread on a Silpat baking tray and bake at 160°C. Stir every 5 minutes using a whisk until the crumble is nicely golden brown.
Let cool and mix in the
Thermomix so no large lumps remain. Melt the white chocolate and mix it into the crumble.
Leave to set in the refrigerator.
Turn the crumble again until smooth.
Store it in the refrigerator.