Making Pistachio Gooey Butter Cake is straightforward when you follow these steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking dish.
2. Cream Butter and Cream Cheese: In a large bowl, beat the softened butter and cream cheese together until smooth.
3. Add Sugar: Gradually add the powdered sugar to the mixture, continuing to beat until well incorporated.
4. Incorporate Eggs and Vanilla: Add the eggs one at a time, beating well after each addition. Stir in the vanilla extract.
5. Mix in Dry Ingredients: In a separate bowl, combine the all-purpose flour, ground pistachios, and salt. Gradually add this mixture to your wet ingredients, stirring until just combined.
6. Transfer to Baking Dish: Pour the batter into the prepared baking dish and spread it evenly.
7. Bake: Place in the preheated oven for 40-45 minutes. The center should remain slightly gooey while the edges are set.
8. Cool: Remove from oven and let it cool in the pan for 15-20 minutes. This step is important to achieve that gooey texture.
9. Top with Chopped Pistachios: Once cooled, sprinkle the chopped pistachios on top for added texture and flavor.
10. Slice and Serve: Cut into squares and serve warm or at room temperature.

Following these steps will lead you to create a beautifully decadent Pistachio Gooey Butter Cake that is bound to impress.