Amount
Ingredient
Preparation



3
cups
flour





2
cups
sugar





1/3
cup
cocoa powder





1
teaspoon
baking soda





1/2
teaspoon
salt





2
cups
water





3/4
cup
vegetable oil





2
tablespoons
vinegar





1
teaspoon
vanilla extract







---

-------------------frosting-------------------



1/3
cup
butter, unsalted

softened



1/3
cup
vegetable shortening





2/3
cup
sugar





1
teaspoon
vanilla extract





1/2
cup
milk

heated to almost boiling

 Heat oven to 35 degrees.

Sift flour, sugar, cocoa, baking soda and salt into a 9x13-inch baking pan.

Add water, oil, vinegar and vanilla.

Mix with a large rubber spatula until smooth, taking care to mix ingredients along edges.

Bake until toothpick inserted in center comes out clean, about 4 minutes.

Cool completely on wire rack.

FROSTING: combine butter and shortening in a food processor or mixing bowl. Add sugar and vanilla.

Mix until smooth, about 2 minutes. Slowly drizzle in milk.

Beat 2 minutes in food processor or 7-1 minutes with a mixer, until smooth, satiny and fluffy.

Chill just 2 minutes before frosting.