Heat your oven to 350F and add cupcake liners to your cupcake tin. Follow the steps on the cupcake package, then add ¾ cup to each liner. Bake for 18 minutes, then remove from oven.
Whip the heavy cream in a separate bowl until you see peaks form. In a different bowl, combine vanilla, sugar, cream cheese, and salt. Fold in the whipped cream until combined.
Pipe your frosting onto the cupcakes, then add black decorating gel and m&ms to create the lightbulbs.