The cook time is just two minutes until they are opaque in the center. It is about the same time to do so on the stove as well. Note that it takes longer with the higher quantities of shrimp you are cooking with and the more water that you are using. Bring a large pot of salt water to a boil and add the Shrimp. As water begins to slowly boil on the edges of the pot, they are done. Remove the shrimp to bowl of ice and water. This immediately stops the cooking. Drain your shrimp, and pat and dry them. Finishing touch will be sprinkling your favorite seasoning to your shrimp. If you prefer to serve them hot, note to be careful, they are not piled high as they will continue to cook and be overcooked.