Butterscotch Hard Candy

Butterscotch Hard Candy

2 cups brown sugar
1 1/2 cups white sugar
1 cup light Karo
1 cup water
2 teaspoons vanilla
1 stick butter
Pinch of salt

Mix sugars and water well.  Boil to 250 degrees.  Remove from heat and add 2 teaspoons vanilla and  1/2 cup butter.  Stir until butter dissolves.  Return to stove and boil to 300 degrees.   Add pinch of salt.  Pour onto a buttered cookie sheet but a marble slab works better.