From Tiffeny Pickett
3 cups whipping cream
2 cups sugar
1 cup karo syrup
Don't try to rush the cooking. I put my stovetop between medium and medium high. You have to sit and stir the whole time (after it hits about 200). Takes 30-40 minutes. I love it though. I put on Christmas music, listen to a book on tape, or watch a Christmas movie from Netflix on my tablet.
Cook to Soft Ball, which in Utah is 230 degrees. Pour into a heavily buttered 9x13 dish.
(I found that on my Taylor thermostat it said 230, but on my digital it said 235)