Mix together the cookie crumb ingredients and freeze for a few minutes to harden.
Meanwhile, blend all the shake ingredients together until smooth. Stir in the cookie crumbs and enjoy! Yields one serving.
Alternately, you could place the blended shake mixture in a bowl in the freezer and freeze for 40-60 minutes, stirring twice within the first half hour. Add the crumbs at the end and stir in by hand, then enjoy as peanut butter cookie dough ice cream.
Notes
Update: I changed the name to "Peanut Butter Cookie Dough Whiteout" on 12.6.16, but the recipe is the same as before.
Recipe by Briana Thomas at https://www.briana-thomas.com/mock-peanut-butter-cookie-dough-blizzard/