In a mixing bowl, combine and whisk together the first 5 ingredients.
Then, add in the peanut butter, maple syrup and vanilla extract and stir until you have a sticky dough. If the dough is too runny, add a couple extra tablespoons of oats.
Take a spoonful of your cookie dough mixture (or use a small cookie scoop to get them all the same size) and roll it between your palms to form a ball, then gently press to flatten until it looks like a cookie. Repeat with remaining mixture until you have 12 cookies.
Place your cookies in an air tight container and refrigerate for at least 1 hour to set.
These stay good in your refrigerator (in a sealed container) for about a week.