2/3 cup butter, softened
1/4 cup white sugar
1 1/4 cups all-purpose flour
1/2 cup butter
1/2 cup packed light brown sugar
2 tablespoons light corn syrup
1/2 cup sweetened condensed milk
1 1/4 cups milk chocolate chips

Preheat oven to 350°F (175°C). In a medium bowl, mix together 2/3 cup butter, white sugar, and flour until evenly crumbly. Press into a 9-inch square baking pan. Bake for 20 minutes. In a 2-quart saucepan, combine 1/2 cup butter, brown sugar, corn syrup, and sweetened condensed milk. Bring to a boil. Continue to boil for 5 minutes. Remove from heat and beat vigorously with a wooden spoon for about 3 minutes. Pour over baked crust (warm or cool). Cool until it begins to fi rm. Place chocolate in a microwave-safe bowl. Heat for 1 minute, then stir and continue to heat and stir at 20-second intervals until chocolate is melted and smooth. Pour chocolate over the caramel layer and spread evenly to cover completely. Chill. Cut into 1-inch squares. These need to be small because they are so rich.