Heat your oven to 350° F. Using a stand mixer with the paddle attachment, beat the butter until light and fluffy, this takes a long time, but it is 100% worth it. Then add sugar and beat well. Add vanilla, then gradually add in the flour. Add the crushed potato chips last and mix until just combined.
Drop by a teaspoon of cookie dough onto cookie sheet a few inches apart. Bake about 12-15 minutes, until slightly brown. Sprinkle with confectioners' sugar while still warm.
Notes
Leslie notes that these are better even the second or third and I found out she is not a liar - they were awesome on day two and day three :)