Dr. Pepper Peanut Brittle

1 Baking/candy thermometer (I don't know if you really need this or not as I have never actually made this recipe...if it were me I would try to wing it without one)
1 1/4 cups of sugar
1 1/2 teaspoons of salt
2 cups roasted, salted peanuts, shelled
3/4 cups of butter (equals 1 1/2 sticks)
1/2 teaspoon of cayenne pepper powder
1/4 cup Dr Pepper
1/2 teaspoon of baking soda

1) Line a baking sheet with baking/wax paper
2) Combine all the ingredients, except the baking soda in a pot and cook on medium heat. Bring to a boil, stirring often.
3) When the temperature reaches 290 remove from heat and stir in baking soda. Mixture will foam up and double in size.
4) Spread mixture very thin on lined baking sheet using a silicone spatula (why you can't use a normal spatula I don't know).
5) When the mixture is cool and hardened (takes 30 minutes), break it into pieces and serve.

Makes 1.5 pounds.