In a large mixing bowl, cream together ¾ cup softened butter, 2 boxes of instant pistachio pudding mix, and ½ cup sugar until light and fluffy, about 2-3 minutes. Beat in 2 eggs, 1½ teaspoons of vanilla extract, and ¼ teaspoon of almond extract until well combined and smooth.

In a separate bowl, whisk together 2 cups of all-purpose flour, ¼ teaspoon of baking powder, and a dash of salt. Gradually add this dry mixture to the wet ingredients, mixing on low speed until just combined.

Preheat your oven to 350°F (175°C). Line a greased 9x13 inch pan with parchment paper, then press the dough evenly into the prepared pan. Bake for approximately 20 minutes.

Once baked, remove the pan from the oven and place it on a wire rack to cool completely, about 30-40 minutes.

While the bars cool, prepare the frosting by beating together 4 ounces of cream cheese and ¼ cup of softened butter until smooth, then add in powdered sugar, 1 teaspoon of vanilla extract, and ¼ teaspoon of almond extract.

Once the bars are cooled, spread the cream cheese frosting over the top. Optionally, sprinkle ¼ cup of chopped pistachios on top.

Cut the cooled and frosted bars into squares, and serve at room temperature.