Mix together cake mix, eggs and vegetable oil and the juice of one orange.
Add 1/4 cup white chocolate chips to the batter.
Spread into a greased 9 in. x 13 in. baking pan. The batter will be thick but easily moved with a lightly greased spatula.
Top with remaining white chocolate chips.
Bake at 350 degrees for 20-25 minutes or until done in the middle.
Allow to cool before cutting.