1 stick of butter.
1 yellow cake mix.
1 bag of semi-sweet chocolate chips.
Preheat the oven to 350° and grease a 9×13 pan.
Melt the butter then whisk it with eggs until combined. Add in the cake mix and stir well.
Add the chocolate chips and mix all together.
Bake for 20 minutes, if you choose smaller pans bake for 25 to 28 minutes.