Yes, samosa dough should be rested for at least 30 minutes before shaping. Resting allows the gluten to relax, resulting in a more pliable and easier-to-handle dough.
Resting samosa dough is a crucial step in achieving the desired texture and ease of handling. When you mix flour and water, gluten develops, which can make the dough elastic and difficult to roll out thinly. Resting allows the gluten strands to relax, making the dough more extensible and less likely to snap back when rolled. This results in samosas that are easier to shape and have a more tender, flaky crust after frying or baking. The resting period also allows the flour to fully hydrate, improving the overall texture and flavor of the final product. Aim for a resting time of at least 30 minutes, but longer resting periods (up to a few hours in the refrigerator) can further improve the dough's workability.
Cover the dough with a damp cloth or plastic wrap while resting to prevent it from drying out and forming a crust. A dry crust will hinder the dough's ability to relax properly.