Add water to a large pot until it is about halfway full and bring to a rolling boil. Add your cream to a large, heat-safe glass bowl (or a smaller pot) and place over the larger pot with boiling water. Heat cream over double boiler until it simmers and forms a thin film on top.
½ cup whipping cream
Remove cream from heat and add chocolate chips.
½ cup dark chocolate chips
Whisk until chocolate chips completely melt from the heat of the cream to form a smooth chocolate sauce.
Add bourbon and continue to whisk until combined.
¼ cup Bourbon
Place the sauce in the freezer for 30 minutes to chill.
Use your hand mixer on high to whip sauce until desired consistency is reached. This may take up to 5 full minutes with your hand mixer on high. The longer you whip, the thicker your sauce will get.