01 - Heat oven to 350°F and line a tray. Beat softened butter and brown sugar, then mix in flour and salt.
02 - Fold in finely chopped apples, oats and nuts. Portion rounded tablespoons with room between them; chill briefly if too soft to handle.
03 - Bake a small first tray, beginning checks around fifteen minutes and continuing until edges and centers are set with no wet flour paste. Adjust later trays to the same size and observed timing.
04 - Rest on the tray until sturdy enough to lift, then cool on a rack.