01 -
2 cups all-purpose flour.
02 -
1/2 cup cocoa powder.
03 -
1 teaspoon baking soda.
04 -
3/4 teaspoon salt.
05 -
1/2 cup unsalted butter, at room temperature.
06 -
1 cup packed brown sugar.
07 -
1 large egg, at room temperature.
08 -
1 teaspoon vanilla extract.
09 -
1 cup buttermilk, at room temperature.
10 -
3/4 cup unsalted butter, at room temperature (for filling).
11 -
1 1/4 cups confectioners' sugar, sifted.
12 -
1 teaspoon vanilla extract (for filling).
13 -
1/2 teaspoon peppermint extract.
14 -
1/8 teaspoon salt (for filling).
15 -
2 1/2 cups marshmallow crème.
16 -
Crushed candy canes, for garnish.