Preheat your oven to 180 C / 350F. Add the almonds, walnuts, and hemp seeds to your food processor. Grind until they reach the texture of fine flour.
Transfer the nut flour to a bowl. Add the erythritol, salt, and baking soda. Whisk the ingredients together and set the bowl aside.
To the empty food processor, add the oil, almond milk, vanilla, eggs, and spinach. Pulse until the mixture is bright green. You can do this step in a blender.
Add the wet mixture to the bowl with the dry ingredients. Whisk until a batter forms. Add in the chocolate chips and fold using a spatula.
Lightly grease a donut pan with oil or butter. Add 2 to 3 tablespoons of batter to each hole. Transfer the pan or mold to the oven.
Bake the donuts for 20 minutes. They are done when they become slightly golden, and an inserted toothpick comes out dry. Set the pan aside to cool.