Sheet pan cookies: How to make easy, crunchy cookie brittle at home Just mix, press and bake. Additions are only limited by imagination. Oatmeal Raisin Cookie Brittle(Lynda M. González / Staff Photographer) By Karen Elizabeth Watts Those iconic cookie edges — crispy, crumbly, browned, sugared — are now attainable as a full-size treat made easily in a sheet pan. The format for this cookie brittle is shortbread. Named for crumbly texture caused by high fat content, the “short” is a result of the fat inhibiting formation of “long” stretchy gluten or protein dough. The sheet pan can be used for slab pies, cakes, breads, pancakes, meats and vegetables — and now brittle cookies. Just mix, press and bake. Use a stand or hand mixer to cream butter and sugar. Precise but playful, the baked dough can be scored while still warm or fractured into shards of cookies, each piece offering incredible crunch.