Here is how I spiced up these yummy box brownies. I started with 2 boxes of Betty Crocker dark chocolate family size brownie mix. I followed the directions on the back of the box ...then I added 1 extra egg, a 1/2 cup of chopped walnuts , a 1/2 cup of mini semi sweet chocolate chip morsles and 1/4 tsp cinnamon. I put them in a 9.5 x 11.5 disposable pan and baked them for approx 1 hr. Let cool for 15 min then cut into squares with a plastic butter knife ...I find the plastic knifes seem to cut warm brownies the best. Sprinkle powder sugar over top and serve warm with vanilla ice cream or wait for them to cool and eat them all by themselves . If you want a slightly thinner brownie use a 9X13" pan and reduce baking time approx 8-10 min.
If you give these a try let me know how you like em.