Preheat oven to 350°F. Coat 2 baking sheets with cooking spray.
Grind oats in a blender or food processor. Transfer to a medium bowl and stir in almond flour, whole-wheat flour, baking soda and salt.
Using a stand mixer or hand mixer, cream together butter and sugar until fluffy. Add egg and vanilla; beat until smooth and creamy. With the mixer running on low, add the dry ingredients, until just combined. Stir in chocolate chips and nuts.
Drop the dough by heaping teaspoonfuls, at least 1 inch apart, onto the prepared baking sheets. Bake cookies, 12 to 15 minutes until light golden brown. Cool the cookies for 2 minutes on the baking sheets, then transfer to wire racks to cool completely.
Store in air tight container. Makes 4 dozen