In heavy sauce pan, bring Cowboy Candy syrup and corn syrup to a boil. Set candy thermometer in syrup and continue to boil, stirring occasionally, until it reaches hard crack stage (300 degrees Fahrenheit) or until syrup dropped into ice water turns brittle.
Remove from heat and quickly add vanilla, baking soda, butter and peanuts. Pour quickly onto baking sheet and use 2 forks to stretch and pull brittle into a rectangle.
Once brittle is cool, break into pieces.
Notes
This recipe gets HOT. Be very careful when working with the hot syrup and brittle.