Dang, just looking at this photo makes me want a Shake Shack custard right now haha.
The Frosted Holiday Cookie custard was offered in December, and as expected it quickly became one of my favorites. I believe it's the regular vanilla custard base, but the fun part was the big chunks of cookie and the rainbow sprinkles mixed in throughout. Anyone that's a fan of holiday cookies and/or sprinkles would love this one! I hope it comes back next year for the holidays :o)