Leatherby's Caramel Sauce

10 T. butter
1 c. brown sugar
1 c. white sugar
1 c. light karo syrup
1 t. salt
1 c. whipping cream

Combine butter, sugars, syrup and salt in a sauce pan.  Bring to a boil and boil for 8 minutes.  Add the whipping cream and bring back to a boil for two more minutes.  (After the sauce is cooked, keep refrigerated - or warm to keep thin and runny for toppings.)