Crush cookies into fine crumbs and place them in a large mixing bowl.
Add 120g of chopped walnuts to the bowl.
In a saucepan, heat milk, sugar, and vanilla sugar over medium heat until sugar dissolves.
Stir in cocoa powder and mix until the mixture thickens.
Add butter to the mixture and stir until fully melted and combined.
Pour the chocolate mixture over the cookie and walnut mixture. Mix well.
Press the mixture into a baking pan and smooth it into an even layer.
Sprinkle the remaining 20g of chopped walnuts over the base layer.
Heat cream in a saucepan until it begins to simmer, then remove from heat.
Stir in chopped chocolate until smooth.
Pour the chocolate mixture over the base layer and spread evenly.
Chill in the refrigerator for at least 30 minutes to set.
Slice into portions and serve chilled.
Serving Suggestions
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