Here is the recipe for a simple sweet crepes. Beat the heavy cream, vanilla extract and confectioners sugar in a stand mixer fitted with the whisk attachment until stiff peaks form. Add dulce de leche and mix well. Assemble the cake by placing a crepe on a plate or cake stand. Scoop out about 1/4 cup of the dulce de leche cream and spread it out all over the surface of the crepe. Repeat with the remaining filling and crepes, ending with a cream on top. Sprinkle with toasted walnuts and drizzle with caramel sauce. Refrigerate before serving.