In a heavy saucepan, melt butter. Stir in sugar and salt, then add corn syrup. Mix well. Add sweetened condensed milk, stirring constantly. Continue stirring and cook to 248°. Remove from heat and stir in vanilla. Pour into parchment lined 8-inch square pan. Let set for half a day. Cut into squares and wrap in confectionary waxed paper or plastic wrap.
Recipe and image taken with permission from Autumn Carpenter's Book, All About Candy Making. All rights reserved.
