Grate zucchini finely and squeeze dry in kitchen towel twice
Whisk melted butter and sugar together
Add eggs and vanilla and mix until smooth
Add flour cocoa powder baking soda baking powder cinnamon and salt
Fold gently until just combined
Fold in squeezed dry zucchini
Fold in chocolate chips last
Pour into greased 7x4 inch loaf pan filling three quarters full
Preheat air fryer to 325°F for 3 minutes
Place pan in air fryer basket
Cook for 25 minutes checking at 20
Cover loosely with foil if top darkens too quickly
Toothpick in center should come out with moist crumbs
Cool in pan for 10 minutes before removing
Slice with serrated knife and serve