Baking is hard—it's literally a science. If you put in just too much of one thing, the entire bake might as well just go in the bin. A lot of these home bakers learned the hard way... Moral of the story: patience is key, and read the recipe!
Cilantro in a cookie sounds awful. Some people like it especially topped on Mexican dishes. Others think it tastes like soap. Everything can agree that this probably was just awful.
Olaf Needs Help
It's probably best if you don't show this to a child... It might scar them for life. Olaf should never be displayed in such a horrifying light!