Preheat the oven to 350°F. Grease and line three 8-inch round cake pans with parchment paper. Cut out 8 inch circles for the bottom of the pans.
In a large mixing bowl using a hand mixer or stand mixer, beat together the wet ingredients: 2 large eggs, 2 teaspoons vanilla extract, ½ cup whole milk, ½ cup sour cream, and ½ cup vegetable oil.
In a separate bowl, beat together the dry ingredients: 2 cups granulated sugar, 2 cups all-purpose flour, 1 cup natural cocoa powder, 2 teaspoons baking soda, 1 teaspoon baking powder, and 1 teaspoon kosher salt.
Gradually add the dry ingredients to the wet ingredients, mixing until just combined.
Add 1 cup of hot coffee to the batter and beat until smooth. The batter will be thin, but that’s okay!
Divide the batter between the three prepared 8-inch cake pans.
Position it on the center rack of the oven to ensure even baking, avoiding placement too close to the top or bottom. Bake in the preheated oven for 20-22 minutes, or until a toothpick inserted into the center comes out clean (you can bake 2 cakes at a time)
Allow the cakes to cool in the pans for 10 minutes before transferring them to a wire rack to cool completely.