3/4 c Margarine @ rm temp
1/4 c Sugar
1/2 c Liquid egg substitue @ rm tm
Liquid sugar substitue equal
To 1/3 cup sugar
2 t Vanilla
2 c Cake flour
2 t Baking powder
1/4 c Instant dry milk;
1/3 c Cocoa
1 c Water @ room temperature

Cream together margarine and sugar at medium speed until light and
fluffy. Add egg substitue, sweetener, and vanilla to creamed mixture
and beat at medium speed for 1/2 minute. Stir together flour, baking
powder, dry milk, and cocoa to blend. Add 1 cup water to creamed
mixture along with flour mixture and mix at medium speed only until
smooth. Spread evenly in a 9 inch square pan that has been greased
with margarine. Bake at 350 degree F. for 30-35 minutes or until a
cake tester comes out clean and the cake pulls away from the sides of
the pan. Cool to room temperature and cut 4 x 4 to yield 16 equal
servings. Food Exchange per serving: 1 BREAD EXCHANGE 2 FAT
EXCHANGES; CAL: 157 CHO: 16gm; PRO: 3gm; FAT: 9gm
LOW-SODIUM DIETS: Use salt-free margarine and low-sodium baking
powder.

I like the way you have the food exchanges listed for the recipe! It makes it nice and easy.

By the way the addition of instant dry milk would make it a have a decent amount of calcium too, and that is a good thing:)