Mix butter and cookie crumbs in a deep glass pie dish and pat into a crust. Bake at 350 for 8-10 minutes. Fill half way with a layer of ice cream and top with drizzles of syrup. Repeat layers. Cover and freeze at least 4 hours. Cut into wedges to serve and garnish with whipped cream and berries. Serve slices atop of syrup drizzled plates if desired.