Preheat 350F and line a baking sheet with parchment paper.
Cream together the softened butter and coconut sugar until the mixture is smooth, slightly fluffy, and lighter in color—this process is called creaming and helps create that soft, chewy texture. Add the egg, maple syrup, and vanilla extract; mix until fully combined. In a separate bowl, whisk together the oat flour, baking soda, and salt. Add the dry ingredients to the wet mixture and stir until just combined—do not overmix.
Fold in the chocolate chips. Using a cookie scoop or tablespoon, portion out about 2 tablespoons of dough per cookie and place them on a baking sheet, spaced about 2 inches apart.Bake for 10–12 minutes, or until the edges are lightly golden brown and the centers still look slightly soft. When in doubt, pull them out! They’ll finish setting on the baking sheet as they cool, giving you that perfect chewy texture. Leave the cookies on the sheet until completely cooled.