To make dry bread cubes, cut bread into 1/2-inch cubes. (You'll need 6 to 7 slices of bread for 4 cups dry cubes.) Spread in a single layer in a shallow baking pan. Bake in a 300 degree F oven for 10 to 15 minutes or until dry, stirring twice; cool. The bread will continue to dry and crisp as it cools.