Peanut butter downfall cookies/biscuits: 3 ingredients of doom

These are cookies in the US, biscuits in NZ ...

Take two fairly healthy ingredients and with the simple addition of the White Death, make an unholy trinity of ridiculous, iniquitous deliciousness. If you find an easier recipe, for goodness sake don't tell me, I have enough trouble with these.

I think I got this recipe from my sister, else from somewhere on teh interwebs.
Do use proper peanut butter - hydrogenated vegetable oil should not be listed anywhere on the ingredients.

Flatten with a fork ... or as The Teen did, with your fingers (?!)

Easiest Ever Peanut Butter Cookies

1 cup peanut butter
1 egg
1 cup sugar

1. Mix all together in a bowl
2. Drop by spoonfuls onto a lined or greased pan. (Optionally, flatten with a fork etc)
3. Bake at 350 F/ 180C until firm - this depends on how big and thick they are, say 8 - 18 minutes? 

Try hard to let them cool before you eat them. Try hard to leave some for others. Good luck with that.