• 1/2 c. mini-semisweet chocolate chips
• 1/2 c. finely chopped walnuts, if desired
With an electric mixer, beat together butter, brown sugar, granulated sugar, egg and vanilla on medium speed until light and fluffy. Reduce speed and add flour, baking soda and salt, mixing well. Stir in chips and, if desired, nuts.
Divide dough in half and shape each piece into a log about 2 inches wide. Wrap logs tightly in plastic wrap. Refrigerate until firm, about 1 hour, or place in freezer.
To bake, preheat oven to 350 degrees. Unwrap log and, with a sharp knife, slice into 1/4-inch slices for crisp cookies. For a slightly softer cookie, cut 1-inch slices, then cut into thirds. (If using a frozen log, let sit at room temperature for 15 minutes before slicing.) Place nuggets or slices 2 inches apart on ungreased cookie sheet and bake for 10 to 12 minutes or until golden around the edges. Gently transfer to wire rack to cool.