Preheat oven to 350 degrees.
1 box Yellow Cake Mix (follow directions on box)
2 lbs. part skim ricotta cheese
1 cup powdered sugar
2 tsp vanilla or almond extract
Prepare cake mix according to package directions. Spray bottom of a 9 x 13-inch cake pan and pour prepared cake batter into pan.
Beat eggs just until blended. Add powdered sugar, ricotta and flavoring. Beat until blended. (Don't overbeat or ricotta will get too thin.)
Spoon ricotta mixture over unbaked cake batter. Make sure it is spread evenly.
Bake 55-60 minutes at 350 degrees. Dust powdered sugar over the top after cake has cooled. Delicious served with warm fruit and syrup. Or, serve cold with whipped cream topping.