Preheat your oven to 350°F. Line a 9x13-inch baking pan with parchment paper, allowing some overhang for easy removal later.
In a large mixing bowl, beat together 2 cups (422 grams) of granulated sugar, 2 cups (254 grams) of all purpose flour, 1 cup (92 grams) of natural cocoa powder, 2 teaspoons of baking soda, 1 teaspoon of baking powder, and 1 teaspoon of kosher salt until well combined.
In a separate bowl, combine 2 large eggs, 2 teaspoons of vanilla extract, ½ cup (126 grams) of whole milk, ½ cup (118 grams) of vegetable oil, and ½ cup (122 grams) of sour cream. Mix until smooth.
Pour the wet mixture into the dry ingredients and beat until just combined.
Finally, slowly add 1 cup of hot coffee to the batter, mixing until fully incorporated.
Pour the batter into the prepared 9x13-inch pan, spreading it evenly.
Position it on the center rack of the oven to ensure even baking, avoiding placement too close to the top or bottom. Bake for 30-35 minutes, or until a toothpick inserted in the center comes out with a few moist crumbs.
Allow the cake to cool in the pan for about 10 minutes before transferring it to a wire rack to cool completely.