Chocolate chip cookie

From Memory Alpha, the free Star Trek reference.

A chocolate chip cookie was an old Earth food item made with chocolate chips typically served as a dessert or snack.

Shannon O'Donnell had a ritual of purchasing a bag of chocolate chip cookies whenever she went back on the road to "treat herself." Her eventual husband, Henry Janeway, preferred oatmeal cookies since he was allergic to chocolate. (VOY: "11:59")