Chocolate Marbled Banana Nut Bars

Steps

• 1

  Heat oven to 350°F. Spray bottom and sides of 9-inch square pan with cooking spray. In large bowl, stir cookie mix, 1/2 cup butter and egg until soft dough forms. Reserve 1 cup of the dough. To the remaining dough, add mashed banana and walnuts; mix well. Spread in bottom of pan.
• 2

  In medium microwaveable bowl, microwave 3/4 cup of the chocolate chips with the remaining 2 tablespoons butter on High about 1 minute, stirring after 30 seconds, until melted and smooth. Add reserved cookie dough; stir until well blended. Drop chocolate dough by spoonfuls evenly over top of banana mixture; spread gently to almost cover. Swirl chocolate mixture into banana mixture with knife for marbled design.
• 3

  Bake 35 to 40 minutes or until toothpick inserted in center comes out clean. Cool 15 minutes.
• 4

  In small microwavable bowl, microwave remaining 1/2 cup chocolate chips on High about 1 minute, stirring after 30 seconds, until melted and smooth. Drizzle over bars. Cool completely, about 2 hours. For bars, cut into 5 rows by 4 rows. Store covered at room temperature.