| Preheat oven to 350°F |
| Grease and flour two 9-in round cake pans |
| Soften the butter and cream cheese |
| 1/2 cup unsalted butter, softened | cream until fluffy, 5 min | beat in one at a time | beat in | add alternately, beat just until combined | divide between pans, bake 350°F 25 to 30 min | cool 10 min in pans, then completely on a rack | fill, then frost top and sides |
| 1 1/2 cups sugar |
| 2 large eggs, room temperature |
| 2 Tbsp red food coloring |
| 1 Tbsp white vinegar |
| 1 tsp vanilla extract |
| 2 1/2 cups all-purpose flour | whisk |
| 2 Tbsp unsweetened cocoa powder |
| 1 tsp baking soda |
| 1 tsp salt |
| 1 cup buttermilk, room temperature |
| 2 packages (8 oz each) cream cheese, softened | beat until smooth | beat in until fluffy |
| 1/2 cup unsalted butter, softened |
| 4 cups powdered sugar |
| 2 tsp vanilla extract |