To make a crispy dosa on a tawa, use a well-fermented batter, heat your tawa to the right temperature (medium-high), spread the batter thinly and evenly, and drizzle oil around the edges while it cooks.
Detailed Explanation:
Making a perfectly crispy dosa at home is an art, and it mostly comes down to controlling heat and batter consistency:
- The Batter is Key: Your dosa batter must be well-fermented. This is crucial for its texture and flavor. It should be of pouring consistency, not too thick or too thin. If it's too thick, add a little water.
- Tawa Preparation: A cast iron tawa or a good non-stick dosa tawa works best. Heat the tawa over medium-high heat. Test the temperature: a few drops of water sprinkled on it should sizzle and evaporate instantly. If it smokes excessively, it's too hot; if the water just sits there, it's too cold.
- Cooling the Tawa (if using cast iron): For a consistent spread, it's often helpful to quickly wipe a hot cast iron tawa with a wet, folded cloth or a slice of onion after every dosa. This slightly cools the surface, preventing the batter from sticking too quickly.
- Spreading the Batter: Pour a ladleful of batter in the center of the tawa. Using the back of the ladle, quickly and gently spread the batter in a spiral motion outwards, creating a thin, even circle.
- Oil and Cook: Drizzle a teaspoon of oil or ghee around the edges and a little on the surface of the dosa. Cook on medium heat. You'll see the edges start to lift and turn golden brown, and the surface will look cooked through.
- Crispy Finish: Continue cooking until the dosa is beautifully golden brown and crispy all over. For a softer dosa, you might remove it sooner, but for crispy, let it cook until it achieves that deep color. Fold it in half or roll it up.
Pro Tip:
If your dosa batter is sticking or not crisping, try adding a tiny pinch of sugar to your batter before cooking. It helps with browning and crispiness without affecting the savory flavor much.