Learn about their health benefits and our favorite ways to cook with them. Shelled pistachios should easily crack open when a little pressure is applied, pulling the shells away from each other.

One great thing the pistachio has going for it is an easy-access feature. This tasty treat is split on one side—just enough space to wedge in your fingernail to separate and break open the shell. Like ...

Given the choice between shell-on and shell-off pistachios at the grocery store, I always choose the former. The already-shelled pistachios seem like an extravagance reserved for investment bankers ...

Add this to your grocery list: pistachio nuts in the shell. Two new studies published in the journal Appetite found that this snack can help curb calorie consumption and lead to weight loss. (Not ...