Preheat your oven to 350°F (175°C). Grease two round cake pans and lightly dust with flour.

In a large bowl, whisk together flour, cocoa powder, baking soda, and salt.

In another bowl, beat sugar and vegetable oil until fluffy. Add eggs one at a time, then mix in buttermilk, vanilla extract, and red food coloring until well combined.

Gradually combine the dry ingredients with the wet mixture until just mixed—avoid overmixing.

Divide batter between prepared pans and bake for 25–30 minutes or until a toothpick comes out clean. Allow cakes to cool before frosting.

For frosting, whip cream cheese and butter until smooth; gradually add powdered sugar and vanilla until combined. Frost cooled cakes.