Peanut Brittle: Lightly butter two cookie sheets.
In a small cup, place the baking soda, vanilla extract, and butter (with the butter on top). Set aside.
In a medium sized saucepan over medium high heat, bring the water, corn syrup, sugar, salt, and peanuts to a boil, stirring constantly with a wooden spoon. Cover the pan with a lid for about one minute to allow the sides of the pan to wash themselves down and dissolve any sugar crystals. Remove lid after one minute. Then clamp a candy thermometer to the side of the pan, making sure it does not touch the bottom of the pan and, stirring occasionally to prevent the peanuts from sticking to the bottom of the pan, cook until the candy thermometer reaches 296 degrees F (147 degrees C).
Remove from heat and stir in the baking soda, vanilla extract, and butter (the brittle will puff up) stirring for about 30 seconds. Immediately pour half the brittle onto each of the two buttered cookie sheets. If you want a thin brittle, then while the brittle is still very hot, use gloved hands to stretch the brittle until you get the brittle to how thin you want it. Do this by gently pulling the edges of the brittle, working your way around the entire mass. Let the brittle completely cool and then break into pieces. Store in an airtight container or a plastic freezer bag as this will prevent the brittle from becoming sticky and breaking down. Store at room temperature for up to two weeks.
Makes about 2 pounds. Preparation time 30 minutes.
Read more: http://www.joyofbaking.com/candy/PeanutBrittle.html#ixzz1eVQ43q1j
Peanut Brittle:
1 tablespoon baking soda
1 teaspoon pure vanilla extract
1 tablespoon (14 grams) unsalted butter
1/2 cup (120 ml) water
1 cup (240 ml) light corn syrup
2 cups (400 grams) white granulated sugar
1/8 teaspoon salt
2 cups (240 grams) raw peanuts
http://allrecipes.com/Recipe/moms-best-peanut-brittle/detail.aspx