Yogurt, like revenge, is a dish best served freezing cold and topped with rainbow sprinkles. Cool off a piping-hot palate with today’s Groupon: for $5, you get $10 worth of frozen yogurt at Menchie’s Frozen Yogurt; choose between the San Marcos or Carlsbad locations.

The helpful staff at Menchie’s grants visitors the sweet-tooth independence to assemble their own glacial delights, streamlining the complicated art of frozen-yogurt consumption into three simple steps: mix, weigh, and pay. Patrons choose from a rotating menu of 14 flavors, such as cake batter, red velvet, chocolate-covered banana, and then bejewel the chilly masterpiece with topping choices such as fresh fruit, candy-bar pieces, fudge and caramel sauces, and Oreos with compound fractures. The regular New York cheesecake yogurts mingle with low-fat, nondairy, and no-sugar-added flavors, adding health-conscious options to the dessert-bar repertoire. Crammed cups or freshly made waffle bowls are weighed ($0.41/oz.), scores are settled, and cheerful taste buds skip off to enjoy frosty spoonfuls. Packed with live and active cultures, each cup or cone acts as a Trojan horse of protein and calcium that can lower cholesterol, boost immune systems, and topple legendary walled empires.