This cake is so easy and so chocolate also great for anyone who can't eat eggs.I usually do one and a half recipes for 9x13 so you should be fine doubling for you sheet pan it's a nice thick cake.

In large mixing bowl combine :3 cups of flour , 2 cups sugar , 6 tbs unsweetened cocoa ,1 tsp salt , 2 tsp baking soda mix together and add , 1/2 cup oil , 2 tbs vinegar , 2 tsp vanilla , and 2 cups cold water mix until smooth-pour in greased and floured pan ( for large sheet cakes I line the bottom with parchment paper make it a breeze to turn out when done ) Bake in preheated 350 defree oven for 30 minutes ( double recipe probably 45 to 50 minutes .

Frosting :/2 cup butter softened , 1 1lb box confectioners' sugar , 1 cup cocoa powder , 2 tsp vanilla and 1/2 cup of milk of half & half beat all till smooth

If you try it let me know how it goes Murrey the caterer