Add the brown sugar and the 1/2 cup sugar and cream together.
Beat in the peanut butter until smooth
Add the eggs one at a time, mixing until combined.
Mix in the vanilla.
Add the flour, baking soda, baking powder and salt and combine well. It's more moist than most cookies, so don't go adding a bunch of extra flour to bring it up to a normal dough, it's perfect just the way it is.
Pour the remaining 1/4 C sugar in a small bowl.
Take a heaping tablespoon of and form into a ball, I use a #100 scoop.
Coat the ball in sugar by rolling it around in the bowl.
Place on a cookie sheet about 2 inches apart.
Press the tines of a fork into the balls to create the cross-cross pattern on the top and to flatten the dough just a bit.
Bake 9 to 10 minutes, they'll be super soft but will set as they cool.