Preheat your oven to 350 degrees
Grease and line your baking pans or cupcake tins and set aside for now
Combine 1/2 cup of room temperature salted butter with 2 cups of granulated sugar, 1/3 cup of brown sugar, 3 large eggs, 1 large egg yolk and 2 teaspoons of pure vanilla extract in a large bowl and use an electric hand mixer to beat until fully combined
Add 1/3 cup of a neutral oil and 1 cup of sour cream and mix until fully incorporated
Sift in 2 and 1/3 cups of all purpose flour, 1 cup of natural unsweetened cocoa powder, 1 and 1/2 teaspoons of baking soda, 1 teaspoon of baking powder and 3/4 teaspoon of salt and mix until mostly incorporated
Add a cup of hot coffee and mix until everything is just combined
Transfer the cake batter into your prepared pans
Baking times: 24-26 minutes for two 9” pans, 20-22 minutes for three 8” pans, 16-18 minutes for standard cupcakes
When a toothpick will come out of the center of the cake clean, the cake is ready to transfer out of the oven to cool
Let the cake cool completely before frosting