1 2/3 cups whole wheat flour
1/2 cup baking cocoa
1/4 cup oat bran
1/4 cup sugar
1/4 cup packed brown sugar
2 tablespoons nonfat dry milk powder
1 tablespoon instant coffee granules
1 teaspoon baking powder
1 teaspoon baking soda
1/4 teaspoon salt
2 eggs
2 cups plain yogurt
6 tablespoons butter or margarine, softened
1 tablespoon finely grated orange peel
3/4 cup semisweet chocolate chips