1cream the butter,peanutbutter,and mayo together first,then add the sugars, then stir in the flour and finally the vanilla.
The dough will be kinda stiff so spoon out a little at a time and place on cookie sheet covered with parchment paper it's easier to slide them off. Then using a fork and a cup of water dip your fork into the water and press into the cookie dough balls until flattened
2Place in a preheated 350 degree oven and cook for about 8 to 10 minutes or until lightly brown don't over cook they will be hard after cooling.
Makes about 3 dozen