Frozen custard is a fickle dessert—it keeps its cool when faced with an army of screaming spoon holders but melts instantly when greeted by a smiling sun. Explore the cool treat's elusive nature with today's Groupon: for $5, you get $10 worth of frozen custard at Doozle's Frozen Custard. Choose between two locations in St. Charles and Florissant.

Specializing in the delicate art of custard freezing, Doozle's Frozen Custard prepares an extensive menu of deliciously icy treats. Served in the time-honored flavors of chocolate, vanilla, and chocolate-vanilla twist, old-fashioned custard forms the mainstay of the shop's variety of mouth-cooling deserts. Crisp cake cones ($1.69–$2.69) prop up stratospheric piles of pillowy custard, and fudge-slathered sundaes ($2.29–$3.29), gooey banana splits ($4.79), and thick shakes ($3.69–$4.59) facilitate all manner of rude slurping noises and emergency napkin runs. A generous selection of candy and nut toppings can embellish any cold treat, making it an even more delicious way to chill a tongue heated from pungent spices or a rap battle among auctioneers. For a healthy twist, patrons can opt to have any of Doozle's cool treats made with "Lite," a 98% fat-free alternative with half the calories of standard frozen custard.