Heat oven to 350 degrees.
Mix all of the dry ingredients with a fork in an ungreased 8"x8" square pan.
Stir in remaining ingredients except chocolate chips and powdered sugar. Make sure to scrape the the edges and corners to incorporate all of the dry ingredients.
Sprinkle with chocolate chips.
Bake at 350 degrees for 35-40 minutes, or until toothpick comes out clean. Let cool completely before dusting with powdered sugar.