In a pan or pot, place sugar and water. Over medium heat, mix them together then cover and allow to boil
1/2 cup sugar, 3 Tbsp water
Once boiling, remove the cover and continue to boil until sugar becomes a deep amber colored liquid.
This will all happen quickly now, don't step away from your caramel sauce. Slowly pour in the heavy cream and stir. Next add butter and stir in completely.
3/4 cup heavy cream, 2 Tbsp stick butter
Cook caramel to desired temp, checking with thermometer.