The dosa batter is set properly. Add ¼ tsp baking soda and 1 tsp lemon juice. Mix well.
Heat a dosa tawa, sprinkle some water, and wipe it clean. This helps reduce the temperature of the tawa.
Pour 1½ ladles of batter in the center of the tawa and spread it evenly.
Apply some oil and butter around the edges and cook on medium flame until the dosa becomes crisp on both sides.
Spread the prepared masala on one side, fold the dosa, and serve hot with chutney.