Add the crackers and corn flakes and sugar into a food processor and pulse until you have fine crumbs.
Combine with the butter in a bowl.
Line an 8 X 8-inch dish with parchment paper, and place half of the crust in the dish, and press down evenly with a spoon, or fingers.
Place the dish in the freezer.
In a large bowl, place the softened cream cheese, and add the sweetened condensed milk, and Cool Whip, and stir well to blend.
Add about 1/3 cup of the nonpareils, and stir. Remove the dish from the freezer, and place the filling in the dish, and smooth it evenly on top.
Place the remainder of the crust mixture on top of the filling, and smooth out evenly on top of the filling.
Sprinkle about another 1/3 cup of the nonpareils on top of the crust, and place the dish back in the freezer, overnight for best results.
Remove the dish about 15 minutes before serving to soften just a little.
Cut into 2 X 3-inch squares, and serve. Enjoy!