Step 1

Preheat the oven to 350°F and set 2 racks at the upper-middle and lower-middle positions. Line 2 baking sheets with parchment paper or nonstick baking mats.

Step 2

In the bowl of a food processor fitted with the blade attachment, combine the pistachios, granulated sugar, confectioners’ sugar, salt, and cardamom. Process until the pistachios are the texture of fine sand and there are no visible pieces of pistachio left, 60 to 90 seconds. Transfer the mixture to a large bowl and add the egg whites and vanilla extract. Mix with a rubber spatula until a thick, paste-like dough forms.

Step 3

Using a medium 1¾-inch (#cookie scoop or 2 tablespoons, portion out the dough and roll into balls. (The dough will be sticky, so don’t fret if they are not perfect balls.) Place the dough balls at least 3 inches apart on the prepared baking sheets (8 per sheet).

Step 4

Bake both sheets at the same time, swapping the top sheet to the bottom rack and bottom sheet to the top midway through baking, until the tops of the cookies crack and the bottoms are just starting to brown, 12 to 14 minutes. (Don’t overbake the cookies. They aren’t the kind of cookie that browns that much on the top. It’s best to err on the side of underbaking for this recipe.) Let the cookies cool completely on the baking sheets before removing with an offset spatula.