The BEST Gooey-ist Whole Wheat Brownies on Earth

I know - the title sounds like an oxy-moron but I had these brownies at a friend's house on Sunday, and they are sooooo good. She was kind enough to share the recipe. Since they're made with whole wheat you don't feel bad about feeding them to your family. I also learned a lot about flour - this particular one is made with "white whole wheat" which my friend grinds from hard white winter wheat, but I found in a high-end grocery store. I am getting quite an education.
Here's the recipe:

2 sticks butter
3/4 cup cocoa
4 eggs
2 cups sugar
2 tsp. vanilla
1 1/2 cup flour
1/2 tsp. salt
1 tsp. baking powder

This is all the recipe that I got. I melted the butter in a saucepan while I mixed all the dry ingredients in a large bowl. Then I added the eggs and butter to the dry ingredients and mixed. Then you spread the batter in a 9 x 13 inch pan and bake at 350 for about 30 minutes. Since there were no directions I checked it about every 10.
Enjoy - they are terrific with a cold glass of milk! YUM.