In a large bowl, cream margarine and sugar until light and fluffy. Add
Egg Beaters 1/4 cup at a time, beating well after each addition.
Sift together flour, baking powder and salt. Add alternately to creamed
mixture with milk. Stir in vanilla.
Pour into a greased and floured 9 x 13 inch pan. Bake at 325 degrees for
1 hour or until toothpick tests done. Cool in pan about 10 minutes and
turn out on rack and flip so top side will be up. Frost with Cream Cheese
icing.