Elephant Poo Chocolate Cake

The first time I made this cake was for someone at works birthday. It was the hottest day of the year and it melted in my car on the way to work! My boss said it looked like elephant poo - hence the name!!! I was so upset because I was so proud of it, it looked lovely in my fridge :-(
The second time I made it, it was a lot cooler outside and it stayed perfect!

For the Cake:
2 cups granulated_sugar
1 3/4 cups all_purpose_flour
3/4 cup cocoa_powder
1 1/2 tsp baking_powder
1 1/2 tsp baking_soda
1 tsp salt
2 eggs
1 cup milk
1/2 cup vegetable_oil
2 tsp vanilla_extract
1 cup boiling water

For The Frosting:
1/2 cup butter
2/3 cup cocoa_powder
3 cups icing sugar (confectioners_sugar)
1/3 cup milk
1 tsp vanilla_extract