What is a formula for chocolate sheet cake?

A formula for chocolate sheet cake can be found on the Taste of Home site and calls for sugar, eggs, cocoa, margarine and flour alongside elements for chocolate icing. Another great formula is Texas sheet cake from http://www.veramiklas.com/ .

To make a chocolate sheet cake sans preparation, blend together some sugar, some flour, 1 teaspoon of heating pop and 1/2 teaspoon of salt in one dish and 1/some buttermilk, 2 eggs and 1 teaspoon of vanilla concentrate in another dish. In a pan, bubble some water blended with 1/some margarine and 1/some preparing cocoa. Expel the chocolate sauce from the warmth, and pour it and the buttermilk blend into the flour blend. Empty the hitter into a preparing skillet, and cook at 375 degrees Fahrenheit for 20 to 22 minutes.

While the cake cooks, make the icing by including 1/some spread, 1/some heating cocoa and 1/some milk to the pan, and heating it to the point of boiling. Mix regularly, and once everything is all around mixed, expel the pan from the warmth. Blend in some confectioners' sugar and 1 teaspoon of vanilla concentrate. Ice the cake while it is still hot, and top with 1 measure of slashed walnuts. Cool before serving