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 light and fluffy, about 2–3 minutes.
03 - Add 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 - Gently fold the semi-sweet chocolate chips, chopped maraschino cherries, and walnuts (if using) into the dough using a spatula until evenly distributed.
07 - Drop rounded tablespoon-sized scoops of dough onto the prepared baking sheets, spacing them approximately 2 inches apart to allow for spreading.
08 - Bake for 10–12 minutes, or until the edges are lightly golden and the centers appear set but still soft.
09 - Let the cookies rest on the baking sheets for 5 minutes, then transfer to a wire cooling rack to cool completely before serving or storing.