Ingredients: 1 cup unsalted butter, softened 1 cup granulated sugar 1 large egg 1 teaspoon vanilla extract 2 1/4 cups all-purpose flour 1/2 teaspoon baking powder 1/4 teaspoon salt 1 cup pistachio nuts, finely chopped Instructions: Preheat your oven to 350°F (175°C). Line a baking sheet with parchment paper. In a large mixing bowl, beat the butter and sugar together until light and fluffy. Add the egg and vanilla extract, and beat until well combined. In a separate mixing bowl, whisk together the flour, baking powder, and salt. Add the dry ingredients to the wet ingredients, and mix until a soft dough forms. Stir in the chopped pistachios. Drop spoonfuls…