but having no limes I plucked out my lemons instead.I omitted the zest from the dough, and this has now become my new favorite shortbread cookie recipe. Shape the dough into a ball and roll in granulated sugar; press flat. Also, I opted for a glaze rather than frosting (this recipe is a frosting despite the tricky name) so I added the juice from one whole lemon, and doubled the powdered sugar; whisk until smooth.
