Mix in saucepan:
1 1/2 cups brown sugar
1/2 cup water
1 tsp white vinegar
stir and bring to hard ball temp. I translate this to, bring to a bubbling mess and cook until when you drop a drip of it off a spoon into cold water, it makes a ball and you squish the ball but its firm.
Take off the heat and mix into 1 stiffly beaten egg white (so, mix this while cooking up the other!)
1/2 tsp vanilla (really ‘add’ the vanilla say about 1 tsp worth!)
1/2 cup chopped nuts.
Pour into parchment paper lined pan (9 x 9 is good) or molds. Let cool completely.