In a large bowl, prepare mix according to package.

Whisk in an extra egg.

Heat waffle iron to medium heat.

Spray with nonstick spray and spoon 2 TBS of batter into center of iron.

Cook for 2 minutes until waffle is just set.

Turn iron off and allow brownie to cool with the waffle iron open for 5 minutes.

Carefully remove the waffle from the iron and serve immediately.