1 (18.25 or 19.75 oz.) pkg. fudge marble cake mix
1 egg
1/3 c. vegetable oil
4 tbsp. water, divided
1 c. Hershey's miniature chips semi-sweet chocolate

Heat oven to 350 degrees. In large bowl, combine cake mix, egg, oil, and 3 tablespoons water; mix with spoon until thoroughly blended. Stir in miniature chips chocolate. In small bowl, combine 2/3 cup batter, chocolate packet from cake mix, and remaining 1 tablespoon water; mix well. Drop vanilla batter by rounded teaspoonfuls onto lightly greased cookie sheet; gently press down center with thumb or back of spoon. Drop chocolate batter by rounded half teaspoonfuls onto top of each cookie. Bake 10 to 12 minutes or until very lightly browned. Cool slightly; remove from cookie sheet to wire rack. Cool completely.