In a bowl add in your whipped cream, Powdered milk, icing sugar, flavour and cold water mix on a high speed using a mixer until fluffy. Put it in piping bag and set it aside

In a cup add cake crumbs in a first layer then pip the whipped cream on second layer, followed by cake crumbs then whipped cream

Repeat the process until the cup is full, add some Nutella for toppings and your sprinkles. Refrigerate and serve