Skipping the resting period for pakora batter results in pakoras that are less crispy and more likely to absorb excess oil during frying. The resting time allows the gluten to relax and the batter to properly hydrate.
When you mix flour with water to create pakora batter, gluten develops. Gluten is a protein that provides elasticity and structure. If you immediately fry the batter without resting, the gluten will be tense, resulting in a tougher, less airy pakora. Resting the batter, typically for 20-30 minutes, allows the gluten to relax. This relaxation leads to a lighter, crispier texture when fried. Furthermore, the resting period allows the flour particles to fully absorb the water, creating a more cohesive batter that coats the vegetables better and prevents them from becoming soggy. Without proper hydration, the batter may not adhere well, leading to uneven cooking and increased oil absorption. The resting period also helps the baking powder (if used) to activate more effectively, contributing to a lighter and fluffier pakora.
If you're short on time, even a 10-15 minute rest is better than no rest at all. You'll still notice a difference in the texture compared to frying immediately.