In a medium saucepan boil milk with trimoline. Add the milk powder and stabilizer, and stir to mix well. Combine the egg yolks and the sugar in a small bowl. Remove the milk mixture from the heat and add a little to the eggs to temper. Return the egg mixture to the saucepan. Add the chocolate and whisk to emulsify. Strain and let rest, refrigerated for 24 hours before churning in a paco jet or spinning in batch freezer.
For the Marshmallows:
Mix ingredients; strain. Fill a whipped cream siphon and charge twice with n2o gas. Allow to rest 3 to 6 hours before using.
Combine all crunch ingredients.
Assembly and Plating:
Spoon 2 tablespoons crunch into each ice cream coupe and place 1 scoop of chocolate ice cream on top. Add a generous portion of marshmallow over the ice cream and burnish with a hand-held blow torch, if desired. Serve immediately.