Line a loaf pan or small round cake pan with parchment paper or plastic wrap for easy removal.
Let your ice cream soften slightly (not melted), then spread a thick layer into the bottom of your pan. Freeze for 20–30 minutes until firm.
Crush the chocolate cookies into fine crumbs, then mix with melted butter and chocolate syrup.
Sprinkle the mixture evenly over the frozen ice cream layer and gently press it down.
Spread your second layer of ice cream on top.
Smooth it out, then freeze for at least 4 hours or overnight until fully set.
In a bowl, combine heavy cream, powdered sugar, and vanilla paste.
Whip until soft peaks form (about 3-5 minutes)
Remove the cake from the pan, spread the whipped cream on top, and add any toppings you like. Serve right away.