Texas Chocolate Sheet Cake Recipe

Preheat oven to 375 degrees F (190 degrees C). Grease a 15 1/2x10 1/2-inch jelly roll pan.

Bring water 1 cup margarine and 1/4 cup cocoa powder to a boil in a large saucepan; remove from heat and stir in flour white sugar and salt. Beat eggs sour cream and baking soda in a bowl; stir into flour mixture until just blended. Pour batter into prepared jelly roll pan.

Bake in the preheated oven until a toothpick inserted into the center comes out clean 20 to 22 minutes.

Meanwhile bring 1/2 cup margarine milk 1/4 cup cocoa powder and vanilla extract to a boil in another saucepan; remove from heat and stir in confectioner's sugar until icing is smooth. Spread icing over cake immediately after removing from oven. Allow cake to cool before cutting and serving.