Storage: Store in an airtight container up to 3 days at room temp, or up to 5 days in the refrigerator. Cookies (baked or unbaked dough) can be frozen—thaw before icing.
Make-ahead: Dough can be prepared up to 48 hours ahead and chilled.
Variations: Swap pecans for walnuts, add cinnamon, use browned butter, or fold in a handful of crushed cornflakes for crunch!