Hi Shirley,
This recipe has been in my family since I was a girl.  It's moist and rich - you can bake, frost, transport and serve it in the same pan!

BLACK MAGIC CAKE

1 3/4 cups all purpose flour
2 cups sugar
3/4 cup unsweetened cocoa
2 tsp. baking soda
1 tsp. baking powder
1 tsp. salt
1/2 cup vegetable oil
2 eggs
1 cup buttermilk (or 1 cup fresh milk with 1 T vinegar stirred in, if you don't have buttermilk)
1 cup brewed (or instant) coffee, cooled

Preheat oven to 350 degrees.  Grease and flour a rectangular (9 x 11) cake pan.

Sift all dry ingredients together, add the wet ingredients.  Beat by hand 2 minutes or with mixer on medium setting until well blended. 

Bake 35 - 40 minutes at 350  or until a toothpick inserted comes out clean.
Cool, and frost if desired.  Mom always made a light vanilla glaze with powdered sugar for this cake, I prefer chocolate frosting, myself!