2 c. sifted cake flour
1 tsp. Arm & Hammer or Cow brand soda
1/2 tsp. salt
1/4 c. vinegar
1/2 c. sweet milk
1 tsp. vanilla
2 eggs
1 1/3 c. sugar
1/2 c. shortening, melted
1 square chocolate, melted

1. Sift flour, baking soda and salt together.

2. Combine, vinegar, milk and vanilla and mix well.

3. Beat eggs and sugar together 1 minute (125 strokes).

4. Add flour mixture, shortening and 1/2 the liquid; stir until flour is moistened and beat 1 minute (125 strokes).

5. Add remaining liquid; beat 1 minute (125 strokes).

6. Place about 2/3 of batter by spoonfuls in 2 well-greased 8-inch layer pans, 1 1/4 inches deep.

7. Stir chocolate into remaining batter until blended; spoon into cake pans in spaces between spoonfuls of light batter. Cut through several times to produce marbled effect.

8. Bake at 375 degrees F. (moderate oven) 25 to 30 minutes.

9. When cool frost with your favorite frosting.