Chocolate truffles

Tomorrow Dad's birthday, cook his favorite dessert - chocolate truffles. I have a few options for the recipe, here's one of them:

200-300 g "Baby" or powdered milk
what milk to choose? we'll show

50 g cocoa

200 g butter

250 g sugar

Boil 100 ml of water and add the sugar there, give it to dissolve, then add the butter and simmer until such time when the mass begins to thicken. Remove from heat and let cool slightly.

Cocoa, add to the milk mixture and mix with the oil mass, roll small balls, roll them in cocoa or chocolate chips, peanut or coconut chips - at your discretion.