CHICAGO — Gatsby Chocolate, the reduced-calorie brand created by Halo Top co-founder Doug Bouton, has unveiled candy-coated milk chocolate-style gems with three times fewer calories than M&M’s candies, according to the company.

Gatsby Gems are formulated with esterified propoxylated glycerol, a modified plant-based oil that tastes and functions like fat with fewer calories, and sweetened with a blend of allulose, erythritol and soluble corn fiber. A serving contains 70 calories and 4 grams of sugar.

“When we started Gatsby Chocolate, we noticed that there were just no other low-calorie chocolates — literally none,” said Mr. Bouton, founder and chief executive officer. “And more shockingly, even the other low-sugar chocolate brands have nearly as many calories as regular chocolate. With three times fewer calories and somehow still an incredible melt-in-your-mouth taste, our Gatsby Gems give the people what they want: the ability to eat the entire bag without the calories, the guilt or the compromise.”

Additionally, the brand added dark chocolate peanut butter cups, joining milk chocolate-style peanut butter cups that contain half the calories and a quarter of the sugar compared to the premium peanut butter cups on the market, according to the company.  A serving contains 50 calories and 1 gram of sugar.

The Gatsby brand debuted last June, offering milk chocolate-style and almond dark chocolate-style bars. Mr. Bouton developed the products with other former members of the Halo Top team following its sale to Wells Enterprises more than two years ago. The full collection of products is available online and rolling out to retail shelves across the country.