Combine crushed cookies in large bowl with melted margarine and peanuts. Press mixture into a 9x13 inch baking dish and freeze until cold.
Spread softened ice cream over cold crust and freeze until set.
Combine confectioners' sugar, evaporated milk, chocolate chips, 1/2 cup margarine and vanilla in large saucepan and bring to a boil over medium heat. Boil for 7 minutes, stirring constantly.
Remove from heat and cool completely; pour mixture over ice cream and freeze until set.
This recipe and picture has been adapted from All Recipes.