This fudge won't stick to the roof of your mouth, but it will stick to your memory. Blend together 1 cup sugar, pinch of salt, 1 cup brown sugar, 1/2 cup peanut butter, until very smooth. Then stir in 3/4 cup sweet milk and cook until it forms a soft ball in cold water. Stir as little as possible while cooking. Cool and add 1 teaspoon vanilla and beat until creamy. Pour into a buttered tin, mark into squares and allow to harden.