<human>:  How can I make a really good chocolate cake?
<bot>: To make a really good chocolate cake, start by preheating your oven to 350 degrees Fahrenheit. Grease a 9-inch cake pan with butter, line it with parchment paper, and set it aside. In a large bowl, mix together 1 cup of sugar, 1 cup of all-purpose flour, 1/4 teaspoon of salt, and 3 tablespoons of cocoa powder. Next, mix in 1/2 cup of melted butter and 1/2 cup of milk. Add 2 eggs, and 1 teaspoon of vanilla extract. Stir the ingredients until the batter is combined. Pour the batter into your prepared cake pan and bake for 25-30 minutes. Let your cake cool before frosting. Enjoy!