Add corn syrup, brown sugar and butter to a medium saucepan over medium low heat, stirring constantly. Heat until mixture starts to boil and then boil for 5 minutes.
Stir in whipping cream and heat until it starts to boil. Remove from heat and let cool for 30 minutes. Serve warm.
Notes
Store covered in the fridge for up to 1 month. Reheat slightly in the microwave before serving.