To prepare a valentines day iced vanilla cookies recipe, first you need to prepare the cookies. Preheat the oven to 375 degrees F. Line two baking sheets with parchment paper and set aside. Cream the butter and sugar with an electric mixer on medium speed until light and fluffy. Add the vanilla and beat until combined. Gradually add the flour and mix until just combined, scraping down the sides of the bowl as needed. Fold in the chocolate chips until the mixture resembles coarse crumbs. Pour the batter into the prepared baking sheet and bake for 12 to 15 minutes or until cookies are lightly browned. Remove from oven and allow to cool completely.