Marshmallow Coffee Walnut Dessert

A long forgotten recipe. I thought about a coffee marshmallow cream and went through my 400 cookbooks to find the right one, I got lucky. It is always good to remember the combination of book and recipe, that makes it easier to know what it looks like.
I updated the recipe a bit and added some twists.

recipe for 6:
150 g marshmallows
150 ml very strong mocca coffee
450 ml double cream
1 tsp vanilla extract
1 1/2 tbsp hazelnut brandy or liqueur
75 g chopped walnuts

Cook a strong mocca or espresso and put it into a saucepan.
Melt the marshmallows in the hot coffee and use a silicon spatula to stir.
Add the vanilla and the hazelnut brandy.

Beat the double cream to soft peaks and wait until the coffee mix is only a bit warm.
Fold the cream into the coffee.
Stir in 1/2 of the walnuts.

Fill in single portions and top off with the other walnuts.
Place in the fridge for 3 hrs minimum.