1 package chocolate fudge cake mix
10 ounces semisweet chocolate; broken small chunks
2 5.5 ounce packages chocolate fudge pudding mix
1/2 cup chopped walnuts
1 1/2 cups mayonnaise
Preheat oven 350 degrees. Combine first 4 ingredients in medium bowl. Mix in mayonnaise. Shape dough by 2 tablespoons into balls. Place on ungreased cookie sheet, spacing 2 inches apart.
Bake until tester inserted in centers comes out clean, about 12 minutes. Cool. (Can be prepared 2 days ahead. Store in airtight container.)
Note: Mayonnaise is the surprise ingredient in these cookies.
Source: Kristin H. R. Small