2 cups chocolate Oreo cookie crumbs (finely crushed)
5 tbsp unsalted butter, melted
1 pinch fine sea salt
24 oz (3 blocks) full-fat cream cheese, softened to room temperature
1 cup granulated sugar
1/4 cup unsweetened Dutch-process cocoa powder
8 oz high-quality semi-sweet or bittersweet dark chocolate, melted and cooled slightly
1/2 cup full-fat sour cream, room temperature
1.5 tsp pure vanilla extract
1/4 tsp fine sea salt