2tbsp(30g)Buttermilk, (whole fat), room temperature
Instructions
Preheat the oven to 350 degrees F. Line a 9x13 inch pan with parchment paper so that there's about 2 inch overhang - or spray with nonstick baking spray and set aside.
In a large bowl, whisk together the dry ingredients - all purpose flour, cocoa powder, milk powder, espresso powder, baking soda, baking powder, and kosher salt. Set aside. 3 cups All Purpose Flour2 tbsp Unsweetened Natural Cocoa Powder2 tbsp Milk Powder1/2 tsp Espresso Powder1 1/4 tsp Baking Soda1/2 tsp Baking Powder1 1/4 tsp Kosher Salt
In a separate large bowl (or bowl of a stand mixer with the paddle attachment), combine room temperature butter, vegetable oil, sugar, and brown sugar. Use a hand mixer to cream together on medium speed until combined and pale and fluffy, about 3-4 minutes. 10 tbsp Salted Butter1/2 cup + 2 tbsp Vegetable Oil1 1/4 cups Sugar3/4 cup Brown Sugar
Begin adding eggs and egg yolk, one at a time, ensuring each egg is fully incorporated prior to adding the next. Then add vanilla extract, vinegar, and red food coloring. Continue to mix until combined (the batter may split a bit, this is normal. It'll come back together once the dry ingredients are added) 4 large Eggs1 Egg Yolk1 1/2 tbsp Vanilla Extract1 1/2 tbsp Vinegar1 tbsp Red Gel Food Coloring
Add half of the flour mixture and mix until smooth, about 20 seconds, then add the buttermilk and sour cream. Continue to mix until smooth, about 10-15 seconds, then add the remainder of the dry ingredients and continue to mix until a smooth batter forms, about another 20-30 seconds. Pour hot coffee into the bowl and whisk until just combined. 1 1/4 cups Buttermilk1/3 cup Sour Cream1/3 cup Coffee
Pour batter into the prepared pan and bake for 38-42 minutes, until a toothpick inserted into the center of the cake comes out with just a few moist crumbs. Allow the cake to cool completely in the pan, the remove onto a wire rack or serving plate to frost.
Now make the cream cheese frosting. Add cream cheese and butter to a large bowl. Use an electric hand mixer to mix together on medium speed for about 1 minute, until combined and smooth. Add the powdered sugar, one cup at a time, mixing until combined in between each addition. Then add milk powder, vanilla extract, and buttermilk and mix until smooth, about 10-20 seconds. 8 oz Cream Cheese1/2 cup Salted Butter4 cups Powdered Sugar2 tbsp Milk Powder2 tsp Vanilla Extract2 tbsp Buttermilk
Add the cream cheese frosting on top of the cooled cake.
Notes
Sift your cocoa powder if it looks lumpy! Cocoa powder is notorious for clumping, so to prevent a lumpy,uneven batter, sift sift sift!
Use a kitchen scale to measure ingredients by weight for consistent texture (no scooping directly from the bag). Trust me on this, it's worth the extra step!
Cool completely before frosting to prevent melting and sliding.