Preheat oven to 350F (180C) and line a baking tray sheet with baking paper.

In a mixing bowl add runny peanut butter with maple syrup. Combine with a spoon until creamy paste forms.

Fold in the flour and stir until a cookie dough forms (add additional flour as needed to reach the right consistency).

Divide the cookie dough into 12 pieces. Roll each piece into a ball and place it on a baking tray. Flatten each ball with a fork, forming a cross shape on the top of each cookie. Bake for 12-15 minutes until browned.

Remove from the oven and allow to cool for 10 minutes or longer on a baking rack. The longer you allow to cool these cookies the crunchier they will get.