No way, flourless, but still chewy? Yes, I’m not lying. 

Ingredients

2/3 cup oats
1 tsp baking soda
1 cup creamy peanut butter
2/3 cup (light) brown sugar
2 eggs
dash of vanilla extract
~4 handfuls (semi-sweet) chocolate chips

Directions

1. In a small bowl, combine oats and baking soda.
2. In a medium-sized bowl, whisk peanut butter, sugar, eggs, and vanilla with an electric beater. Fold in the dry mixture. Then fold in chocolate chips.

350F, Prep Time: 10 mins, Bake Time: ~12 mins, 16 cookies.

Note

Add a little less sugar?

Reference

Tasty Kitchen – Flourless Peanut Butter Oatmeal Chocolate Chip Cookies