Preheat oven to 400 F. Butter a 15-by-11-inch cookie sheet. Line with whole graham crackers. Melt butter and sugar together in a heavy pot and bring to aboil. Pour the butter/sugar mixture over crackers. Sprinkle with almonds.
Bake 8 minutes, or until bubbling on top. Cool slightly, cut into rectangles and remove from the cookie sheets. Cool on wire racks. Cut in half.