Ingredients:
- 2 ½ cup cake flour
- ½ tsp salt
- 2 Tbsp Dutch processed cocoa powder (it must be Dutch processed)
- ½ cup butter, room temperature
- 1 ½ cup white sugar
- 2 egg
- 1 tsp vanilla extract
- 1 ¼ cup buttermilk
- 2 oz red food coloring
- 1 tsp white vinegar
- 1 tsp baking soda
- marshmallow frosting (see below)
- 3 egg whites, at room temperature
- ¼ tsp salt
- ⅓ cup sugar
- 1 cup karo corn syrup
- 2 Tbsp water
- 1 Tbsp vanilla bean paste