2heaping cups potato chipsI suggest chips with ridges because they look prettier. I also recommend using chips that have not been seasoned with anything other than salt. However, I encourage you to experiment with different types of chips that pair well with your pie fillings.
Mix milk, sweetened condensed milk, egg, and butter in a bowl.
Pour the mixture over potato chips and toss periodically over the span of five minutes so that the potato chips have time to absorb some of the liquid.
Spray the bottom of a 9 inch pie pan with a non-stick baking spray.
Remove the chips from the liquid and line the sprayed pan with the chips, going all the way up the sides of the pan.
Fill the pie with whatever pie filling you plan to use and bake according to the instructions for that pie recipe.