Sour Candy Recipes Lemony Sourdough Protein Shortbread Cookies forthepleasureofeating.com A buttery protein shortbread recipe using sourdough discard. It's stable for cut-outs and has a rich lemon flavor. 3 Icing options give you plenty of decorating choices. submitted by ThePleasureOfEating christmas cookies protein cookies royal icing sour candy sourdough discard sourdough discard cookies Entry Permalink Report Post