Begin by warming your cream in a saucepan over a medium heat until it is simmering. Allow to simmer for a minute or two before removing from the heat and pouring over the chocolate chips in a large heat proof mixing bowl.
Let this sit for about 2 minutes, allowing the cream to warm the chocolate and then stir until smooth like a thin ganache.
Using an electric hand mixer or a stand mixer fitted with a whisk attachment, beat the ganache until stiff peaks form. As the cream is warm, this will take a little longer than you may be used to for whipping cream.