Instructions:
1. Preheat your oven to 350°F (175°C). Grease and flour two 9-inch round cake pans.
2. In a medium bowl, whisk together the all-purpose flour, ground pistachios, baking powder, baking soda, and salt. Set aside.
3. In a large bowl, cream together the softened butter and granulated sugar until light and fluffy. Add the eggs, one at a time, beating well after each addition. Stir in the vanilla extract.
4. Gradually add the dry ingredient mixture to the butter mixture, alternating with the milk. Begin and end with the dry ingredients, mixing until just combined.
5. Divide the batter evenly between the prepared cake pans. Smooth the tops with a spatula.
6. Bake in the preheated oven for 25-30 minutes or until a toothpick inserted into the center of the cakes comes out clean.
7. Remove the cakes from the oven and let them cool in the pans for 10 minutes. Then transfer them to a wire rack to cool completely.