1Heat oven to 350°F. In medium bowl, stir together cake mix, pudding mix, oil and eggs until well combined. Fold in banana.
2Onto ungreased cookie sheets, drop dough by rounded tablespoonfuls about 2 inches apart.
3Bake 8 to 10 minutes or until light brown (centers will be soft). Cool slightly; remove from cookie sheets to cooling rack. Cool 20 minutes.
4In small microwaveable bowl, microwave chocolate chips on High in 30-second increments, stirring in between, until melted and smooth. Use spoon or fork to drizzle melted chocolate over cooled cookies. Let chocolate set before serving.