Place ice cream sandwiches side-by-side in a 9x13-inch pan.
Spread 1/2 jar Dark Chocolate Toffee Sauce over the sandwiches. Heat the sauce in a microwave 20-30 seconds to make it easier to spread if needed.
Spread softened ice cream over chocolate sauce layer.
Drizzle remaining Dark Chocolate Toffee Sauce over ice cream layer. Sprinkle English toffee bits over sauce. Cover and freeze at least 2 hours before serving.