- Preheat oven to 350°F. Line 3 large baking sheets with parchment paper. Set aside. 
- In a medium bowl, whisk together the flour, baking soda, and salt. Set aside. 
- To the bowl of a stand mixer with a paddle attachment, add the butter, brown sugar, granulated sugar, orange zest, and orange juice. Mix on medium speed until light and fluffy (3-5 minutes), stopping to scrape the sides of the bowl as needed. 
- With the mixer on low, add eggs, one at a time, mixing well after each addition. 
- To the butter and sugar mixture, add the dry ingredients and mix on low until just combined. 
- With the mixer still on low, add the white chocolate chips and walnuts until evenly distributed throughout the dough. 
- Using a 2-tablespoon scoop, drop the dough onto the lined baking sheets, leaving about 2 inches of space between each cookie. 
- Bake for 10-11 minutes, or until the edges turn golden brown. Let the cookies cool on the baking sheets for a few minutes before transferring to a wire rack to finish cooling.