01 - Preheat oven to 350°F. Grease a 9-inch round cake pan and line with parchment paper.
02 - Whisk flour, ground pistachios, baking powder, and salt in a bowl. Set aside.
03 - Beat butter and sugar until pale and fluffy, approximately 3 minutes.
04 - Add eggs one at a time, mixing thoroughly after each. Blend in vanilla extract.
05 - Fold in half the dry ingredients, add milk, then remaining dry ingredients. Mix until just combined.
06 - Gently fold raspberries into batter, taking care not to crush the fruit.
07 - Transfer batter to prepared pan. Bake 38-42 minutes until toothpick inserted in center comes out clean.
08 - Cool in pan 15 minutes. Remove to wire rack to cool completely. Dust with powdered sugar and chopped pistachios before serving.