Prepare the Cream Cheese Layer: In a mixing bowl, beat together room temperature cream cheese, a splash of vanilla extract, and powdered sugar until smooth and creamy—this should take about 2-3 minutes. If you're using pistachio cream for an extra flavor boost, blend it in now. Set this luscious cream cheese layer aside as you move on to the next step.

Oven & Pan Prep: Preheat your oven to 350°F (175°C) while you grease a 9×9-inch square or a 9-inch round springform pan with butter or cooking spray. Make sure to coat the pan evenly to ensure easy cake removal later.

Cake Batter Preparation: In a large mixing bowl, cream together softened butter and granulated sugar until light and fluffy—this should take about 3-4 minutes. Add in the eggs one at a time, mixing well after each addition. Then, stir in sour cream and your vanilla extract, creating a luscious batter. Gradually blend in dry ingredients like flour, baking powder, and kosher salt. Finally, fold in the finely ground pistachios.

Streusel Preparation: In a separate bowl, mix together chopped pistachios, brown sugar, softened butter, and flour until crumbs form. The streusel should be crumbly but hold together when pressed.

Assemble: In your prepared pan, spread half of the cake batter evenly across the bottom. Carefully dollop the cream cheese layer over the batter, then sprinkle half of the streusel mixture on top. Gently spoon the remaining cake batter over the streusel before finishing with the remaining streusel on top.

Bake: Place the cake in the preheated oven and bake for 55-70 minutes or until a toothpick is inserted into the center and comes out clean. Allow the Pistachio Coffee Cake to cool in the pan for about 15-20 minutes before transferring it to a wire rack.

Add Glaze (Optional): Drizzle your cooled Pistachio Coffee Cake with pistachio cream for added flavor and a beautiful finish.