Grease cookie sheets or line with parchment paper and set aside.
In a medium bowl, add all ingredients (except optional items) and mix with a rubber spatula until evenly mixed. (once mixed add in optional items and mix in gently)
Using a small ice cream scoop or your hands, roll peanut butter mixture into 1-inch balls, place 2 inches apart on prepared cookie sheet.
Flatten each ball slightly with a fork.
Bake about 8 to 10 minutes or until edges are set and bottoms are lightly browned.