Add 1/2 teaspoon salt to every 1 cup dry breadcrumbs; melt 1/3 cup butter per 1 cup crumbs in a skillet and toss the salted crumbs in the butter until browned. Spices, herbs, grated cheese, or minced cooked meats like bacon can be added while toasting. Cook until the butter is absorbed and the crumbs have turned golden brown.