5 tablespoons unsalted butter, softened
1/2 cup white sugar
1/2 cup unsulfured molasses
1 egg
1 egg yolk
1 1/4 cups all-purpose flour
1 tablespoon Dutch process cocoa powder
1 1/4 teaspoons ground ginger
1 teaspoon ground cinnamon
1/2 teaspoon ground allspice
1/2 teaspoon ground nutmeg
1/4 teaspoon salt
1 teaspoon baking soda
1/2 cup hot milk
2 tablespoons unsalted butter, softened
2 ounces cream cheese, softened
2/3 cup sifted confectioners' sugar
1/4 teaspoon lemon extract