These are the Critical Hit Cookie Cutters available from Thinkgeek. $15 gets you a full set of polyhedral dice cutters including a D4, D6, D8, D10, D12 and D20. Unfortunately, there is no seven-sided die cookie cutter. Roll to see how many cookies I eat? *licking crumbs from fingers* Looks like you rolled a 200.
Keep going for one more closeup shot.
Thanks to DieselNuts, who agrees the very best cookies often look like animal shit.