In a microwave, melt the chocolate chips. Start out by heating at medium heat for 1 minute before stirring, return to microwave and heat at 10 second intervals (stirring between each interval) until almost completely melted and then stir to remove any lumps.
Add the cocoa mixture to the melted chocolate chips and stir well to combine. Allow to cool to room temperature.
In a separate large bowl, beat the cream and sugar until very stiff peaks form.
Add the chocolate mixture and fold in with a spatula until well combined.
Refrigerate until ready to use, up to 5 days.
Notes
I use this as dessert on its own or as a cake filling for my angel food cake.