Drain soaked chickpeas and spread on clean kitchen towel; pat completely dry for 10 minutes to remove surface moisture.
1 cup dried chickpeas
Pulse chickpeas, onion, garlic, parsley, cumin, coriander, salt, and pepper in food processor 10-15 times until mixture is coarse with visible small pieces, not smooth paste.
1 cup dried chickpeas, 0.5 cup onion, 3 cloves garlic, 0.5 cup fresh parsley, 1 tsp ground cumin, 1 tsp ground coriander, 0.5 tsp salt, 0.25 tsp black pepper
Add flour and baking powder, pulse 3-4 times to combine. Mixture should hold together when squeezed but remain slightly grainy; add 1 tablespoon more flour if too wet to shape.
2 tbsp flour, 1 tsp baking powder
Shape mixture into 12-16 balls or patties, place on a plate, and chill for 30 minutes to firm up.
Lightly spray all sides of falafel with oil spray before air frying.
oil spray
Air fry falafel at 375°F for 12-15 minutes, flipping halfway through, spacing falafel about 2 cm apart to allow air circulation. Cook until golden brown and crispy outside but tender inside.