Preheat the oven to 375°F (190°C) and prepare a nonstick donut pan by spraying or brushing with cooking spray. Set aside.

In a mixing bowl, whisk eggs, vegetable oil, and maple syrup until emulsified, light, and foamy, approximately 3 to 4 minutes.

Add almond flour, baking powder, salt, and cocoa powder to the wet mixture. Mix thoroughly with a spatula until a thick batter forms.

Transfer the batter into a pastry bag or a plastic zip-top bag with a cut corner, and pipe evenly into the prepared donut pan.

Smooth the tops of the batter using a wet finger, then tap the pan on a work surface to settle the batter further.

Bake in the center of the preheated oven for 9 to 10 minutes, or until a wooden skewer inserted into a donut comes out clean. Let donuts cool for 10 minutes in the pan before transferring to a wire rack.