1 Preheat oven to 350 °F. Grease baking sheets.2 Combine cake mix, eggs and oil in large bowl. Stir until thoroughly blended. Stir in chocolate chips and walnuts. (Mixture will be stiff.) Shape dough into 36 (1 1/4-inch) balls. Place 2-inches apart on prepared baking sheets.3 ake at 350 °F for 10 to 11 minutes. (Cookies will look moist.) Do not overbake. Cool 2 minutes on baking sheets. Remove to cooling racks. Cool completely. Store in airtight container.