01 - Preheat oven to 350°F (175°C). Grease and flour two 9-inch round cake pans and line bottoms with parchment paper.
02 - In a large bowl, whisk together flour, sugar, baking soda, salt, and cocoa powder until evenly combined.
03 - In a separate bowl, blend vegetable oil, buttermilk, eggs, red food coloring, vanilla extract, and white distilled vinegar until smooth.
04 - Gradually add wet ingredients to dry mixture, folding gently with a spatula until just combined and smooth with no lumps.
05 - Evenly distribute batter between prepared pans, smoothing tops.
06 - Bake for 28 to 32 minutes or until a toothpick inserted into the center comes out clean.
07 - Allow cakes to cool in pans for 10 minutes before transferring to a wire rack to cool completely.
08 - Beat cream cheese and unsalted butter in a large bowl until smooth and creamy.
09 - Gradually beat in confectioners sugar, vanilla extract, and salt until light and fluffy.
10 - Place one cake layer on a serving platter, spread with one-third of the frosting. Top with second layer, then frost top and sides with remaining frosting.
11 - Refrigerate assembled cake for 30 minutes to set frosting and ensure clean slices.