Ingredients
1 cup all-purpose flour
6 tablespoons unsweetened cocoa
1/2 teaspoon baking soda
1/4 teaspoon baking powder
1/4 teaspoon salt
8 tablespoons unsalted butter, softened
1 cup sugar
2 eggs, at room temperature
1 large egg yolk, at room temperature
1/2 teaspoon vanilla
1/2 cup boiling water
filling:
about 1 + 1/2 cups marshmallow fluff
frosting:
1 pint heavy whipping cream
1 cup confectioners' sugar
chocolate shavings for garnish, optional
Preparation
