In a 2-quart saucepan, add 1 cup sugar and 1 cup water. On medium high heat, stir constantly until dissolved. Must use a wooden spoon. Metal or plastic spoon will result in the sauce not forming correctly.
Once the sugar is melted, stop stirring. The sugar mixture will turn to a dark amber color. Keep a close eye on the mixture. Remove from heat once the dark amber color is reached.
BE CAREFUL. THESE NEXT STEPS IS WHERE THINGS CAN GO DOWNHILL FAST.
Add ½ stick butter to sugar mixture and stir until fully melted
Add 1 cup heavy whipping cream at room temp very slowly while stirring. If you pour to quickly, you will have a big mess on your hands.
Transfer mixture in a glass bowl and refrigerate.
OPTIONAL: Add dark rum, Grand Marnier, Jack Daniels Apple Brandy for a great adult kick