Combine 250 g chickpea flour, 0.5 teaspoon baking powder, 150 g onion, 6 g green chilli, 0.3 g coriander leaf, salt to taste, and the batter spices in a wide mixing bowl. Gradually mix in enough water to produce a dense, spoonable batter.
Fill a deep, heavy pan or kadhai with vegetable oil and heat to 180°C (350°F); a cube of bread dropped in should turn golden brown within 30 seconds.
Fry in manageable batches by dropping spoonfuls of the mixture into the hot fat. Cook for 3 to 4 minutes until thoroughly crisp and richly browned.
Lift out the cooked fritters with a slotted spoon, transfer them onto crumpled paper towels to drain excess grease, and serve immediately.
For crisping batters or binding cutlets: use 50% to 60% of the weight. Produces a very crisp shell but lacks the earthy, roasted nutty flavour of besan.
Use 25% of the baking powder's weight (e.g. 1 g for 4 g) and add 2 g cream of tartar or 1 tsp lime juice per 100 g flour. Mix quickly and bake at once.
Steep a tiny pinch (0.1 g per 2 g turmeric) in 2 tbsp warm water; use to match the rich golden hue. Contributes an aristocratic, honeyed floral flavour rather than earthy bitterness.
Use 80% of the weight, finely shredded and browned slowly with a pinch of asafoetida. Replicates the bulk and natural sweetness in gravies without allium.