Ch-ch-chango Bars!

In school, my twins just finished reading "Jalapeno Bagels" by Nastasha Wing. The book is about a boy with Mexican and Jewish heritage, whose parents own a bakery. The story is based on a real bakery in Arcata, CA, called Los Bagels. You can order off their website. Check it out!
The book contains two recipes, one of which is for Chango Bars. What is a Chango Bar?
Basically, it's a blonde brownie with chocolate chips and tons of nuts.
My boys brought home their class newsletter, which had the recipe. They begged to make them, especially since the recipe called for one of their favorite ingredients: chocolate chips! My boys don't like nuts, though, so we left them out.
They are super yummy. Everyone likes them except Meep, who isn't big on the chocolate chip cookie-like thing anyway (though choco. chips themselves are another story).
Since the recipe is readily available on the internet, and is printed in the book, I feel comfortable sharing it:

1/2 Cup butter
1/2 Cup margarine (though I used all butter, see my post about butter,)
2 Cups brown sugar
3 eggs
2 1/3 Cups flour
1 TBSP baking powder
1 tsp salt
1 Cup chocolate chips
1 cup mixed nuts

Melt butter and marg. While this is melting, cream brown sugar and eggs, then add melted butter and marg. Combine flour, baking powder, and salt, and stir into sugar mixture. Fold in chocolate chips and nuts. Pour mixture into greased 9x13 pan, and bake 45-50 minutes at 350 degrees.
*This recipe is from the story Jalapeno Bagels: Houghton Mifflin Reading

Like I said, we left out the nuts because the kids don't like them. But I think they would be even more awesome with the nuts.