Using a standing mixer, beat the butter, powdered sugar, heavy whipping cream and vanilla until combined and stiff peaks. About 5 minutes mixing
Divide the frosting into two bowls
Mix a few drops of the black food coloring into one bowl and mix until combined
Scoop into the piping bag and scoop the white frosting into the second piping bag. Cut the tips off
Using the black frosting, pipe out the detail of a spider web by creating a X Pipe a --- through the middle of the X to create a star
Pipe half circles in between each line to create the web
Using the white frosting, outline the web to create a 3D effect
Using the black frosting, pipe out some spiders to go on the web.