请用英语描述如何制作巧克力蛋糕。
To make a chocolate cake, you will need ingredients such as flour, sugar, cocoa powder, baking soda, eggs, milk, and vegetable oil. Mix the dry ingredients together and then add in the wet ingredients. Mix well until the batter is smooth. Pour the batter into a greased cake pan and bake in the oven for around 30-40 minutes at 350°F. Once the cake is done, let it cool before frosting with your favorite chocolate frosting. Enjoy!