Lime Icebox Pie with Pretzel Crust

1/4 cup of crushed pretzels
1/4 cup sugar
6 to 8 tablespoons of Land O'Lakes butter, melted
1 can (14 oz.) sweetened condensed milk
Zest of 2 limes
Juice of 3 limes
1 envelope of unsweetened Kool-Aid Lemon-Lime drink mix
1 (8 ounce) tub of Cool Whip, thawed and divided

Pulverize the pretzels to a fairly fine crumb. To that add the sugar and stir well to combine. Add the melted butter and mix until crumbs are well coated. Pour into an ungreased glass pie plate and press out to the rim of the pie plate. Stick in the freezer.In a medium bowl, combine the sweetened condensed milk, lime juice, lime zest, and Kool-Aid and whisk until smooth. Remove about 1/2 cup of the Cool Whip from the tub and set that aside for later. Gently fold the remaining Cool Whip into the lime mixture until well blended. Pour this into the frozen crust and return to the freezer for several hours, or overnight.Let stand at room temperature for about 15 minutes to thaw. To make it easier to remove from the pan, grab a large skillet and place a small amount of very hot water in it. Gently set the pie plate into the hot water, taking care that water does not go over the rim! Let it sit for about 30 seconds, and this will help to release the pretzel crust for easier serving.
Serve with a dollop of the remaining Cool Whip.
Store leftovers in the freezer.