Dark chocolate chip cake bars

1 box cake mix
1 stick butter melted
1 egg
1 bag of chocolate chips (penut.butter. ..etc)

9×9 greased pan or larger
Set oven to 325°

Mix all ingredients together in bowl. Press into greased pan.
Bake 20 to 25 minutes.
Should be lightly browned on edges.
Let cool 20+ minutes then cut into bars.