Easy Pistachio Cake

Arrange oven rack in middle position and preheat oven to 350°F. Butter 9-inch-diameter round metal cake pan and line bottom with parchment paper. Butter parchment, then dust pan with flour, knocking out excess. (Alternatively, spray pan with nonstick spray, line with parchment paper, and spray the parchment.)

Using food processor, pulse pistachios until finely ground, about 40 seconds. (Do not overprocess, or mixture will become paste.) Add flour, baking powder, cardamom, and salt and pulse briefly to combine.

In small bowl, combine milk and vanilla.