01 - Preheat oven to 350°F. Line two baking sheets with parchment paper.
02 - In a large bowl, beat the softened butter, granulated sugar, and brown sugar together using an electric mixer until the mixture is light and fluffy, about 2 to 3 minutes.
03 - Add the eggs one at a time, beating well after each addition. Mix in the vanilla extract until fully combined.
04 - In a separate bowl, whisk together the all-purpose flour, baking soda, and salt until evenly distributed.
05 - Gradually add the dry ingredient mixture to the wet ingredients, mixing on low speed just until the flour is incorporated. Do not overmix.
06 - Using a spatula, gently fold in the semi-sweet chocolate chips, chopped maraschino cherries, and walnuts if using, until evenly distributed throughout the dough.
07 - Drop rounded tablespoon-sized scoops of dough onto the prepared baking sheets, spacing each scoop about 2 inches apart to allow for spreading.
08 - Bake for 10 to 12 minutes, or until the edges are golden brown and the centers appear set but still slightly soft.
09 - Let the cookies rest on the baking sheets for 5 minutes, then transfer them to a wire cooling rack to cool completely before serving or storing.