Soft, chewy pistachio cookies made with instant pistachio pudding mix, studded with chopped pistachios and creamy white chocolate chips for a bakery-style treat.
Preheat oven to 350°F. Line 2 baking sheets with parchment paper.
In a large bowl, beat softened butter, granulated sugar, and brown sugar until light and creamy, about 2 to 3 minutes.
Beat in the instant pistachio pudding mix until evenly combined and the mixture turns pale green.
Add the egg and vanilla; mix until smooth, scraping the bowl as needed.
Whisk flour, baking soda, and salt in a separate bowl. Add dry ingredients to the wet mixture and mix just until no dry streaks remain.
Fold in chopped pistachios and white chocolate chips (if using).
Scoop dough into rounded 1.5 tablespoon portions and place 2 inches apart on prepared sheets. For thicker cookies, chill the scooped dough for 20 minutes (optional).
Bake 10 to 12 minutes, until edges are set and centers look just slightly underbaked. Let cool on the sheet for 5 minutes, then transfer to a rack to cool completely.
Notes
For extra flavor and color, lightly press a few chopped pistachios onto the tops of the dough balls before baking. Store cookies in an airtight container at room temperature for up to 4 days or freeze up to 2 months.