My dad, who didn't particularly care for PB cookies, loved these:
Ingredients:
1 Cup Peanut Butter (brand name is better)
1 Egg
1 Cup Sugar
1 Teaspoon vanilla
Mix all ingredients together. Spoon onto ungreased cookie sheet or roll into little balls and place onto cookie sheet.
Then, you can criss cross with a sugar dipped fork, stick a Hershey Kiss in the center, or add anything else you like.
Bake at 350F for 8-12 minutes.
NOPE: you do NOT need any flour.