Literally go down the list as your beat them in a mixing bowl - the more you fluff or blend the butter/peanut butter the better!
Oven at 350˚ now this says for 10-12 minutes but mine always take 15-17 minutes and then they are perfect golden brown.
Here is the peanut butter I use - highly recommend it!
On a side note my oldest made these really fun mini scenes. First one is an earthquake and the second one is Pompeii.