In a large bowl, add peanut butter and syrup. Place into microwave and heat for about 20 seconds. Remove and stir with a spatula until evenly combined. Continue to microwave at 20 second intervals, stirring in between, until the peanut butter thickens and becomes like a paste. This should take between 1 min 20 seconds to 2 minutes. You can also heat the mixture on the stove.
Add in oats and stir until all oats are moistened and evenly mixed. If using dried fruit, stir in the dried fruit. If using chocolate chips, do not add them yet because they will melt.
Scoop out 2 tbsp dough and roll it between your palms to form a compact ball. Place ball onto prepared baking sheet and press down to flatten into a thick round disk. Repeat with remaining dough.
If you plan on adding chocolate chips, press a few into the surface of each disk. You may need to reshape the cookies again if any of the oats become loose from the chips being pressed in.
Place cookie sheet into freezer and freeze until cookies are firm (30 to 60 minutes). You can leave the cookies in there longer as well and just bring them to room temperature for a few minutes before eating. Store uneaten cookies at room temperature for 1-2 days or in the fridge or freezer if you want to store them longer.
The key to your cookies staying together is your peanut butter paste. Make sure to dry out the peanut butter enough so that it becomes a thick paste.
I tried to make these cookies not too sweet to keep them as healthy as possible. If you prefer something sweeter you can add 2 more tbsp of syrup (so 1/2 cup total).
Make sure to use a low sodium or unsalted peanut butter to keep the cookies from being too salty. You can use creamy or chunky peanut butter. I used creamy. Chunky will add some more texture to your cookies.
Nutrition estimate does not include chocolate chips or any mix-ins.
The nutrition information provided are only estimates based on an online nutritional calculator. This is not a comprehensive list of all the nutrients in the recipe (i.e., does not include vitamins, cholesterol, etc). I am not a certified nutritionist. Please consult a nutritionist or doctor for accurate information and any dietary restrictions and concerns you may have.