First, ensure to preheat your oven to 350 degrees Fahrenheit. Next, grease your two 9-inch round cake pans. And line them with parchment paper. After that, make sure to set aside.
Using a large mixing bowl, combine eggs, oil, milk, vanilla. Then, mix using an electric mixer. Ensure to do this until the mixture becomes smooth.
Afterward, add the flour to the mixture. You follow it with the cocoa powder, sugar, cinnamon powder, salt, baking powder, and baking soda. Then, beat until it combines partially.
After that, stir in the coffee until the cake batter becomes smooth and creamy. Because of this, expect the batter to be thin.
Next, pour the chocolate cake batter into the prepared cake pans. After that, bake the chocolate cakes in the oven for 35 minutes. Or until the cakes cook thoroughly.
Lastly, when the cakes cook completely, allow the cakes to cool. And set them aside for later.