Place chocolate chips in a heat-proof bowl. In second microwavable bowl, heat whipping cream to boiling. Add half of the heated cream to chocolate chips. Let sit for approximately 30 seconds. Stir gently with rubber spatula until smooth.
Reheat rest of whipping cream and add to mixture. Stir until smooth. If necessary heat the entire mixture for only a few seconds in the microwave to get rid of any lumps.
Spoon frosting over the top of the cake, letting it drip artistically over the sides. No need to let it cover the entire side. Let some of the layers and filling peek out.