Combine cookie crumbs and butter in a bowl and stir until crumbs are moistened. Press crumbs firmly onto bottom and up sides of a 9 inch tart pan with removable bottom. Bake until set, about 10 minutes. Remove from oven and cool completely.
While crust is cooling, set ice cream on the counter to soften.
Once the crust has cooled and the ice cream is soft enough to spread, spread the ice cream onto the crust.
Freeze until the ice cream is firm, about 1 hour.
Remove from freezer. Use a knife to loosen the sides of the crust and gently press up tart bottom to release it from the sides.
Slice into 8 - 10 pieces. Drizzle each piece with chocolate syrup, top with whipped cream and sprinkles. Serve.
Notes
If you aren't serving 8 - 10 people, just slice a piece for yourself and cover and freeze the rest of it. Nutrition information for estimation purposes only and will vary greatly depending on the type of ice cream used.