Put oats in a bowl and gently loosen.
Add almond flour, whole wheat flour, and baking powder, then mix together.
Cream butter and sugar, then add the egg and mix well.
Combine the oat mixture and butter mixture and mix until evenly combined.
Add chocolate chips and nuts, then knead the dough.
Portion the cookie dough evenly onto a baking pan.
Bake at 180°C (356°F) for 12–15 minutes and let cool.