Easy, lower fat, delicious Brownies

One box of family-sized brownie mix 1 or 2 eggs 1 cup of nonfat or low fat, plain Greek Yogurt Mix all together in a bowl, spread in 9x9 or 9x13 pan that has been sprayed on the bottom. Adding a bit more yogurt makes the brownies creamier. The eggs may be omitted, but I prefer the brownies with at least one egg or one whole egg and one egg white.