Making these incredible Pistachio Pudding Cookies is easy if you follow these steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C) and line two baking sheets with parchment paper.
2. Cream the Butters and Sugars: In a large mixing bowl, beat together the softened butter, granulated sugar, and brown sugar until creamy.
3. Add Pudding Mix and Eggs: Mix in the pistachio pudding mix until fully incorporated. Then, add the eggs one at a time, followed by the vanilla extract. Beat until smooth.
4. Combine Dry Ingredients: In a separate bowl, whisk together the flour, baking soda, and salt.
5. Mix Dry Ingredients into Wet Ingredients: Gradually add the dry ingredient mixture into the wet mixture, mixing well after each addition until a dough forms.
6. Fold in Nuts and Chips: Gently fold in the chopped pistachios and white chocolate chips, if using, until evenly distributed throughout the dough.
7. Scoop the Dough: Using a cookie scoop or tablespoon, drop rounded balls of dough onto the prepared baking sheets, spacing them about 2 inches apart.
8. Bake: Place the baking sheets in the preheated oven and bake for 10-12 minutes, or until the edges are lightly golden. The centers will appear soft.
9. Cool the Cookies: Remove the trays from the oven and allow the cookies to cool on the baking sheets for about 5 minutes before transferring them to wire racks to cool completely.
10. Enjoy: Once cool, these cookies are ready to be enjoyed fresh or stored in an airtight container!