In a 2 qt. saucepan melt butter add water then sugar stir to desolve the sugar put a lid on pot at med temp for 2 minutes. Take off lid turn to high let the sugar mixture get good and golden brown. In meantime put peanuts on silicone mat or very heavaly greased foil in 9x12 baking pan spread peanuts eavenly when mixture is brown pull off heat add baking soda and vanilla stir quickly and pour over nuts spread with the back of a wooden spoon and let cool. When cool break apart in pieces