Atkins diet addicts may prefer protein, but bread and sweets — at least the wearable kind — are currying favor with jewelry junkies. It started, as most fashion trends do, on Sex and the City, where Sarah Jessica Parker sported a gold pretzel pendant. And food-inspired jewelry is everywhere this spring: NYC designer Jennifer Kellogg transformed marshmallow bunnies into seasonally available — and now sold-out — jewelry (jenniferkellogg.com; were $160). DeSignet International offers gold-and-diamond pizzas (whole pie or by the slice) on necklaces, earrings, and bracelets, with faux-ruby ”pepperoni” (888-727-8266; $45-$1,600). And the suggestively titled Washington, D.C.-based Stud Muffins has come up with a way to indulge in the popular breakfast treat — guilt free — with its silver, gold, and diamond muffin cuff links, key chains, earrings, necklaces, and bracelets for men, women, and kids (studmuffin jewelry.com, $25-$675). ”We use the ‘finest ingredients’ to make a nonfat treat,” says Stud Muffins prez Maria Titelman, ”that makes everyone feel great.” Let them wear cake!