01 -
Preheat your oven to 350°F (175°C). Line a 9x13-inch metal baking pan with parchment paper, leaving some overhang on the sides for easy removal. Set aside.
02 -
In a large mixing bowl, whisk together the flour, sugar, cocoa powder, baking powder, baking soda, and salt until thoroughly combined and no cocoa lumps remain.
03 -
Add the milk, vegetable oil, sour cream, lightly beaten eggs, and vanilla extract to the bowl with the dry ingredients. Stir everything together until well combined. At this stage, the batter will be quite thick with a consistency similar to brownie batter.
04 -
Carefully pour the hot coffee into the batter and whisk until everything is well blended. The batter will transform from thick to very thin and pourable. Don't worry—this is exactly what you want for an incredibly moist cake!
05 -
Pour the cake batter into your prepared baking pan. Bake in the preheated oven for 30-35 minutes, or until the top springs back when gently poked and a cake tester or toothpick inserted into the center comes out clean or with just a few moist crumbs attached.
06 -
Allow the cake to cool completely in the pan on a wire rack before frosting or storing. For the best texture and flavor, let it cool for at least an hour.
07 -
Once cooled, frost with your chosen frosting if desired. The cake can be served directly from the pan or lifted out using the parchment paper overhang for a more elegant presentation on a serving platter.