Jerry Lewis' Vinegar Cake

Ingredients

110 gr butter
300 gr sugar
2 eggs
4 gr vanilla
2 squares bitter chocolate
250 gr flour
120 ml sour milk
1 gr salt
5 gr baking soda
16 ml vinegar

Instructions

Cream together butter and sugar until light and fluffy. Stir in eggs. Add vanilla and blend well. Add chocolate. Sift flour with salt and add to creamed mixture, alternately, with sour milk. Mix together soda and vinegar and add to mixture. Pour into 2 greased 23 cm layer pans. Bake at 190ºC degrees for 25 minutes.