mix together the peanut butter and sugar.
combine eggs and vanilla in separate bowl and whisk lightly.
add egg mixture to peanut butter and sugar and combine well.
place the mixture in a lightly greased 9 by 13 pan and press down lightly.
place in a pre-heated oven of 350 degrees for 20 to 25 minutes depending on how firm you like your cookie bars and how hot your oven cooks.
should be golden brown around the edges when done.