For the Cake – 2 cups 1.1 GF flour or all-purpose flour – 4 tsp baking powder IF USING: All purpose flour, reduce to 2 TSP – ½ tsp baking soda – ½ tsp kosher salt – 2 large eggs – ⅔ cup sugar – 1 ½ cups sour cream – 1 cup butter room temperature – 2 tsp vanilla extract – 1 tsp pistachio extract – 1 cup pistachios finely ground For the Cream Cheese Layer – 8 oz cream cheese room temperature – 1 tsp vanilla extract – 1 ½ cups powdered sugar – ½ cup pistachio cream For the Streusel Topping – 1 cup pistachios (roasted, lightly salty) chopped – ½ cup brown sugar – 8 tbsp butter room temperature – ½ cup flour