Preheat oven to 350ºF. Line cookie sheets with parchment paper.
In large bowl, beat butter, sugar and vanilla with electric mixer until light and fluffy. Add potato chips; mix until combined. Add flour; stir until just combined. Scoop dough to form 1 in. balls; place 2 in. apart on prepared cookie sheet. Flatten to 1 1/4 in. thick.
Bake 12-14 minutes or until edges are golden brown. Remove cookies to wire rack; cool completely. If desired, partially dip cookies into melted candy, allowing excess to drip off; sprinkle with crushed potato chips. Allow to set on parchment paper.