Marshmallow Pilgrim Hats Here's a treat that looks old-fashioned but is made with two favorite modern-day sweets: marshmallows and chocolate. Ingredients 24 chocolate-striped shortbread cookies 12-ounce package of chocolate chips 24 marshmallows tube of yellow decorators' frosting Instructions Set the chocolate-striped cookies stripes down on a wax-paper-covered tray, spacing them well apart. Melt the chocolate chips in a microwave or double boiler. One at a time, stick a wooden toothpick…