1- 1/2 gallon vanilla ice cream-in Texas we would only use Blue Bell, but use your favorite.

1 tub Cool Whip

Topping:

Chocolate Syrup

Whipped Cream

Take ice cream out of freezer for about 15 minutes before so it thaws a bit.  

In a large bowl, mix ice cream, Oreos and Cool Whip together.  Pour into a freezer safe 9"x13" dish.  Freeze overnight.

When ready to serve, cut into squares and drizzle chocolate syrup over and top with whipped cream.