Auntie M's Dark Delicious Vinegar Chocolate Cake

Temp: 350 deg F (180 deg C)  Time: 50-60 minutes

3 cups flour
2 cups sugar
2/3 cup cocoa
2 tsp baking soda
1/2 tsp salt
2 egg yolks
1 cup vegetable oil
2 Tbsp vinegar
2 cups cold water
1 tsp vanilla

Combine flour, sugar, cocoa, baking soda, salt, stirring well together. Make a well.
Add egg yolks, oil, vinegar, water and vanilla. Mix well and pour into a 9" x 13" pan. Bake.