*snicker* Betty Crocker - add eggs, oil, water, and any mix-ins you want! I can't bake brownies from scratch, and I've never had any fabulous scratch brownies. I love Betty's, just the basic mix, and my favorite mix-in is Andes baking chips - peanut butter morsels are good too!
If I make it from a mix I usually add chocolate chips. I don't make them often but I have a couple different recipes. I love them when they come out chewy. I don't have my recipe book handy but I know it calls for three eggs.