Meanwhile, prepare the glazes: To make the chocolate glaze, in a saucepan over medium heat, combine the cream, butter, and corn syrup. Cook, stirring occasionally, until the butter melts and the mixture is hot but not boiling, 2–3 minutes. Remove from the heat and add the chocolate but don’t stir. Let stand for about 30 seconds, then stir until the chocolate is melted and the glaze is smooth. Stir in the vanilla. Let the glaze cool until thickened, about 15 minutes. Transfer the glaze to a bowl. To make the vanilla glaze, in a small bowl, stir together the confectioners’ sugar, milk, and vanilla. To make the lemon glaze, in a small bowl, stir together the confectioners’ sugar and lemon juice. Set the glazes aside.