Bring first 3 ingredients to 240 degrees or until all water has boiled off.

Add peanuts and margarine and cook until 275 degrees.

Test it by dropping a bit into some cold water. If crunchy, it is ready.

Once you get it to the crunchy state, which is around 280 degrees, add 1 tsp water, 1 tsp vanilla, and 2 tsp baking soda.

Stir well and spread thin on silicone pads for best results. Otherwise, you can heat cookie sheets in oven and spread with butter, and then spread the brittle all over.

Once cooled, break into pieces.