Old-Fashioned Peanut Brittle
["2 c. sugar", "1 Tbsp. butter", "1/2 tsp. baking soda", "1 c. peanuts", "1 tsp. vanilla"]
["Melt sugar in a heavy skillet (iron works better).", "Stir constantly until melted.", "Stir in butter, baking soda, vanilla and peanuts.", "Pour onto a large buttered platter quickly and spread with forks to the thickness desired.", "It is very hot and thickens very fast.", "Let cool and then break up into pieces."]
["sugar", "butter", "baking soda", "peanuts", "vanilla"]