Recipe(tried): Homemade Caramel

I make this caramel to use for turtles, chocolate dipped caramels, and just plain caramels:

2 c. sugar
2 c. half and half, divided
1/2 c. butter (do not use margarine)
3/4 c. corn syrup

Melt butter in a large, heavy saucepan. Add 1 c. half and half, corn syrup and sugar. Cook over medium high heat, stirring frequently, until the mixture comes to a boil. Add remaining 1 c. half and half. Reduce heat to medium and cook, stirring frequently, to firm ball stage. (This will take a while. Mixture will get really bubbly and foamy before it starts to thicken and turn color.) Let cool and shape into balls to dip, or pour into a 8" square pan, lined with buttered foil. Let cool, remove from pan and cut with a buttered knife or pizza cutter into squares to dip in melted chocolate.