In a bowl, mix butter, oil, eggs, and sugar. Beat with a stand mixer.
Add flour, teff flakes, salt, baking soda, baking powder, macadamia nuts, and chocolate chips (knead for 1 minute).
Using a teaspoon, make portions and flatten them into balls.
Preheat the oven to 180ºC (350ºF). Bake for ten minutes, placing the tray in the middle rack.
Remove from the oven; as the tray cools, the pastries will become crispy.