Preparation / Directions:
1. Lightly grease a 15 1/2 x 10 1/2 inch jelly-roll pan. Have ready a small bowl of ice water. 2. Melt butter in a 4- to 5-quart pot. Stir in sugar and water, then milk. Bring to a boil over medium-high heat. 3. Boil 10 to 15 minutes, without stirring, until candy thermometer registers 234 F to 240 F (soft-ball stage) or when a small amount dropped into the bowl of ice water forms a soft ball that flattens when removed from water. 4. Off heat add vanilla, without stirring. When just cool (110 F) and "skin" forms over top of mixture, stir with a wooden spoon until thick and paler. 5. Pour into prepared pan. Chill until firm. Break into bite-size pieces. Store airtight in a cool place, up to 2 months.
Makes 3 pounds.