Perfect One Bowl Brownies

I'm a boxed brownie kind of gal...but I can't wait to try these. I got the recipe from here.

Perfect One Bowl Brownies
submitted by Melanie
1/2 cup butter
1/2 cup canola or vegetable oil
2 cups sugar
1/2 cup cocoa
4 eggs
3/4 tsp salt
1 tsp vanilla
1 3/4 cup flour
1 cup chocolate chips (although I never measure--I just sprinkle them on top)

Preheat oven to 350. In a medium bowl melt butter in microwave, then stir in oil, sugar and cocoa. With a wooden spoon stir in the remainder of the ingredients except for the chocolate chips. Spread into a 9x13 pan sprayed with nonstick cooking spray. Sprinkle the chocolate chips over the top. Bake in a preheated oven for 25-30 minutes. If your toothpick comes out clean you have cooked them too long! DO NOT OVERCOOK!