Ok- we took a box of Dunkin Heins Devils Food Chocolate Cake mix...
1 1/3 cup of frozen spinach which I pureed with water (enough water to just cover the spinach and microwaved it for 30 seconds to soften the spinach)
1/2 cup of oil
3 Tbs wheat germ
Mix, pour into cupcake pan and bake for 20-30 minutes at 350
Kids LOVED them and I didn't feel as guilty as I usually do giving them chocolate cupcakes:)