Cream together the butter and peanut butter. Do not melt the butter! The consistency of the cookies will be better if the butter is not melted. Also, try to handle the dough as little as possible so as not to melt the butter with your hand heat ;)
Mix in both kinds of sugar
Beat in the eggs (and vanilla)
In a separate bowl, mix all the dry ingredients together.
Add dry ingredients to the wet ingredients, until everything is mixed. Do not over-mix!
Using a spoon or your hands, plop equal portions of dough onto a clean baking sheet. You can roll the dough (minimally - try not to heat it too much with your hands)You can use a fork to press down the dough and make a pattern. You could also shape the dough into a tyrannosaurus rex (PLEASE send photos if you do)... The shape is up to your imagination.
Bake in the pre-heated oven for about 12 min.
Eat them, share them, give them to your neighbours!
Store in an air-tight container. Tip: if the cookies get too crunchy/hard for your liking, store them in a sealed container with a piece of bread. It softens up the cookies.