<human>:  How do I make a chocolate cake from scratch?
<bot>: To make a chocolate cake from scratch, you will need all-purpose flour, cocoa powder, baking powder, baking soda, salt, butter, sugar, eggs, vanilla extract, and milk. Begin by preheating your oven to 350 degrees. Next, mix together the flour, cocoa powder, baking powder, baking soda, and salt in a large bowl. Then, in a separate bowl, mix together the butter and sugar until the mixture is light and creamy. Then one at a time, add the eggs, mixing until fully incorporated. After that, add the vanilla extract and milk and mix until combined. Finally, pour the dry ingredients into the wet ingredients and mix until a batter forms. Grease and flour a round cake pan, then pour the batter into the pan. Bake the cake for 30-35 minutes, or until a toothpick inserted into the center of the cake comes out clean. Let the cake cool before frosting and serving.