Use room temperature butter for easier creaming and a better cookie texture. For chunkier cookies, chop chocolate chips into larger pieces. Toast nuts lightly before adding for extra flavor. Avoid overbaking to keep centers soft and chewy. Chill the dough before baking for perfectly round cookies. Substitute half the butter with coconut oil for a richer cookie. Variations include nut-free, spicy kick, vegan, extra chewy, orange zest, and sea salt twist options. Store cookies in an airtight container at room temperature for up to 5 days or freeze for longer storage.