Originally Posted by jpinmaryland
so you're not supposed to leave the shell on when grilling?
You can grill shrimp either way. With the shell off, they will cook very fast so watch them closely.
Raw shrimp are a greyish white color. When you cook shrimp, the greyish white turns to snow white. you can see the color change move from the surface of the shrimp touching the pan (or grill) up towards the center of the shrimp. Before the color change reaches the middle, turn the shrimp over and do the other side. It's done when it's all snow white (with reddish markings). Don't leave it on for a little longer "just to be sure it's done", it already is.