Triple-Chocolate Cherry Bars

I made these for F's birthday. They were delish :)

(courtesy Betty Crocker)

1 box chocolate cake mix
21 oz. cherry pie filling
2 eggs, beaten
1 cup chocolate chips
chocolate frosting
1. Heat oven to 350F (325F if dark, non-stick pan). Grease and flour, or spray with baking spray with flour, 15x10x1-inch or 13x9 inch pan.
2. In large bowl, gently mix dry cake mix, pie filling, eggs, and chocolate chips with rubber scraper, break up an undissolved cake mix by pressing with scraper. Carefully spread in pan.
3. If 15x10x1, bake 25-30 minutes. If 13x9, bake 35-40 minutes, or until toothpick inserted in center comes out clean. Cool completely, about 1 hour. Frost with frosting. For bars, cut into 8 rows by 6 rows. 48 bars.