All-Clad vows that its Prep & Cook, $1,000, will become “your very own sous chef.” Bellini claims that “there is no better assistant” than its Kitchen Master, $550.

These appliances, best described as food choppers that also cook, are marketed as a way to make preparing a meal from scratch easier than ever. They can whip up soups, stews, and chocolate mousse—but at prices like these, we half expected them to also clean up and walk the dog. We decided to see whether they measure up to the hype.

CR's findings: Both appliances have digital displays, are intuitive to use, and are sold with the promise—among other things—to whip up risotto with the push of a few buttons and without any supervision.

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The Bellini produced good-tasting fare, but its aggressive stirring changed the food’s texture. “The Bolognese and caramelized onions were finer-textured than usual, and the rice broke down, making the risotto mushy,” says Bernie Deitrick, a CR engineer. “And not all the steamed mussels, which typically take only a few minutes on the stovetop, were done after 15 minutes.”

The All-Clad did a much better job with the risotto, and it steamed the mussels faster, but it wasn’t good at caramelizing onions. It prepared tasty Bolognese, garlic mashed potatoes, and other dishes, but none were a revelation. Prepping and cooking in a single bowl cuts down on dirty dishes, but the small size (both have a capacity under 3 quarts) means you can’t feed a crowd.

The verdict: The All-Clad did better than the Bellini, but neither impressed us enough to earn precious counter space. A food chopper or food processor won’t cook but can handle much of the same food prep at a fraction of the price.

Editor's Note: This article also appeared in the November 2017 issue of Consumer Reports magazine.