Baked Caramel Corn
["1 c. butter", "2 c. brown sugar, packed", "1/4 c. light corn syrup", "1/4 c. dark corn syrup", "1 tsp. salt", "1/2 tsp. baking soda", "1 tsp. vanilla", "6 qt. popped popcorn", "2 c. peanuts (optional)"]
["In large, heavy saucepan, melt butter, sugar, syrups and salt. Bring to a boil, stirring constantly; boil without stirring for 5 minutes.", "Remove from heat and stir in soda and vanilla.", "Slowly pour over popcorn and nuts mixing well.", "Turn into 2 large shallow baking pans.", "Bake at 250\u00b0 for 1 hour, stirring every 15 minutes. Remove from oven and cool completely.", "Store in an airtight container."]
["butter", "brown sugar", "light corn syrup", "corn syrup", "salt", "baking soda", "vanilla", "popcorn", "peanuts"]