It is fantastic!
3/4 c heavy cream
1/4 c light corn syrup
1 1/4 c sugar
4 T butter
1/2 t salt
In sauce pan, melt sugar without stirring over medium heat. Swirl the pan to coat the sugar. Cook 4 minutes.
Microwave the corn syrup and cream for 2 minutes.
Remove the sugar from the heat and carefully add the cream and stir with spoon. Return sauce to low and add butter and salt. Stir until all caramel is melted.
Transfer to a heatproof glass jar.