I cheated, and bought a pre-made crust. Below is the original recipe. This was an amazing desert, and so easy!
1 1/4 cups crushed pretzels
1/4 cup sugar
6 tablespoons butter or margarine, melted
1 can (14 ounces) sweetened condensed milk
1/2 cup lime juice
1 envelope Kool-Aid Lemon Lime Unsweetened Soft Drink Mix
1 tub (8 ounces) cool whip whipped topping, thawed, divided
Mix crushed pretzels, sugar and butter. Press firmly onto bottom and up side of 9-inch pie plate. Refrigerate until ready to fill.
Combine condensed milk, lime juice and drink mix in large bowl until well blended. Remove 1/2 cup whipped topping; refrigerate until ready to use. Gently stir in remaining whipped topping. pour into crust.
Freeze 6 hours or overnight. Let stand at room temperature 15 minutes or until pie can be cut easily. Garnish with reserved whipped topping. Store leftover pie in freezer.
Jello & CookWhip: Favorite Desserts, 2007