Selfmade Chocolate Sheet Cake

System:

• 1 1/2 cups sugar
• 2 cups sour milk or buttermilk
• 3 cups flour
• 2 teaspoons baking soda
• 2 teaspoons baking powder
• 2 teaspoons vanilla
• 1 cup cocoa
• 4 eggs
• 2 teaspoons salt
• 1 1/3 cups oil

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