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 using an electric mixer until light and fluffy, about 3 minutes.
03 - Add eggs one at a time, beating well after each addition. Mix in the vanilla extract until fully incorporated.
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 creamed butter mixture, mixing on low speed just until no dry streaks remain. Do not overmix.
06 - Gently fold in the semi-sweet chocolate chips, chopped maraschino cherries, and walnuts (if using) with a spatula until evenly distributed throughout the dough.
07 - Drop tablespoon-sized scoops of dough onto the prepared baking sheets, spacing them about 2 inches apart to allow for spreading.
08 - Bake for 10 to 12 minutes, or until the edges are lightly golden and the centers appear set but still soft.
09 - Let the cookies rest on the baking sheet for 5 minutes, then transfer to a wire cooling rack to cool completely.