I followed this recipe:

http://www.food.com/recipe/sue-bs-chocolate-cake-31804?photo=3558
Ingredients:

3/4 cup cocoa powder

3/4 cup boiling water

1 cup buttermilk

1 cup canola oil

4 large eggs

1 tsp vanilla

2 cup sugar

2 cups flour

1/2 tsp salt

2 tsp baking soda
1. Mix cocoa powder with boiling water.

2. Mix buttermilk, oil, eggs and vanilla.

3. Mix sugar, flour, salt and baking soda.

4. Add dry ingredients into buttermilk mixture.

5. Add cocoa mixture into batter.

6. Pour into baking pan.

7. Preheat oven to 180 degree C and bake for 30 mins.
It’s really an easy cake to bake. Yet, it’s very moist and delicious.