Button cookies - love this idea! You need a shortbread (butter cookie) recipe, two biscuit cutters (one slightly smaller than the other), and a drinking straw (to make the holes). Aww, cute as a button!
Button cookie inspiration - she links to an older post of hers with a sugar cookie recipe for the cookies (I might try with a shortbread cookie recipe instead). Wouldn't these be fabulous at a sewist workshop?