Mumbai's essential street food — spiced potato ball in a crispy besan batter. The filling inside vada pav. Simpler than it sounds and better than it should be.
Batata vada is the filling inside vada pav — and it is excellent on its own. A ball of spiced, mustard-tempered mashed potato, coated in a thin besan batter and deep-fried until golden. Unlike the more complex ragda patties, batata vada is fast and forgiving. The potato filling uses a mustard-curry leaf-green chilli tempering that is the signature flavour of Mumbai street food, and the thin besan coating crisps immediately in hot oil. The combination — spicy, tangy filling inside a crispy, neutral-tasting shell — is the template for dozens of Indian snacks.
Heat oil. Pop mustard seeds. Add turmeric, curry leaves, green chilli and ginger — they will sizzle immediately. Add to mashed potato along with lemon juice, coriander and salt. Mix well. Taste — it should be perfectly seasoned on its own.
The filling must be well-seasoned before coating because the besan batter is neutral and adds no flavour. The mustard-curry leaf tempering provides the signature Mumbai street food flavour profile. The lemon juice brightens and adds acidity that prevents the filling from tasting flat.
Divide filling into 12 equal portions. Roll into smooth balls. Refrigerate for 10 minutes if time allows.
Chilling the filling firms the potato through starch retrogradation, making the balls easier to dip in batter without deforming. Warm potato balls deform when dipped, producing irregular shapes and uneven coating.
Mix besan, spices, baking soda and water to a medium-thin batter — it should coat a spoon but drip off freely. Heat oil to 180°C. Dip each ball in batter and fry 3–4 at a time for 3 minutes until golden.
A thinner batter than kachori is correct for batata vada — the filling is already fully cooked and only the batter needs to cook. Thin batter produces a delicate, crispy coating rather than a thick shell. The pinch of baking soda creates tiny CO2 bubbles in the batter, making it lighter and crispier.