In an 8-inch skillet, melt ¼ cup butter; remove from heat and stir in ¾ cup finely crushed graham cracker crumbs and ½ cup of fairly coarsely broken walnuts.
Distribute as evenly as possible in a 13- by-9-by-1-inch pan (crumb mixture will not cover bottom); bake in a preheated 375- degree oven, stirring once or twice, until lightly browned -- about 8 minutes.