Peanut Or Pecan Brittle
["4 c. sugar", "2 c. water", "2 c. Karo syrup", "1 1/2 tsp. baking soda", "4 to 6 c. raw peanuts or pecans", "1 tsp. salt", "3 tsp. butter"]
["You will also need a candy thermometer."]
["sugar", "water", "syrup", "baking soda", "peanuts", "salt", "butter"]