Preheat oven to 375°F. Line two baking sheets with parchment paper.
In a large bowl, beat the butter, brown sugar, and granulated sugar until creamy and light, about 1-2 minutes using a stand mixer or electric mixer.
1 cup unsalted butter, 3/4 cup firmly packed light-brown sugar, 3/4 cup granulated sugar
Add the eggs, vanilla, and baking soda dissolved in water. Mix again, scraping the bottom and sides of the bowl.
2 large eggs, 1 teaspoon vanilla extract, 1 teaspoon baking soda
Add flour and salt, mixing until combined. Stir in the chocolate chips and walnuts.
2 1/4 cups all-purpose flour, 1 teaspoon table salt, 2 cups semisweet chocolate chips, 1 cup chopped walnuts
Drop tablespoonfuls of dough onto the prepared baking sheet using a small cookie scoop.
Bake for 10-12 minutes until golden brown around the edges. Cool on wire racks.