Chile Brittle

2 cups granulated sugar
1 cup dark brown sugar, packed
1/2 cup light corn syrup
1/2 cup water
1/4 cup chile (half habanero and
    half dried ground chipotles)
1/8 teaspoon salt
1/4 cup soft butter or margarine
1/8 teaspoon baking soda
1 1/2 cups whole pi