Frosting is a two color pattern using fair-isle knitting to create an intriguing effect.
Use your favorite colors and mix and swirling ice cream for your head :)

To wear this hat inside out just weave in strands on the back as go instead of classic stranded colorwork.

As this hat is worked top down you adjust the size as you go just follow the increasing section of the directions until you reach your head circumference and the continue straight.
BTW this also allows you to work this pattern for any head and with any yarn ;)

Hope you have fun with it