What are mandoline slicers used for?

Mandoline slicers are used to cut fruit and vegetables into fast, even, uniformly thick slices, and often into juliennes (matchsticks), batons or crinkle/waffle cuts, by passing the food over a sharp fixed blade with an adjustable gap that sets the thickness. They are used whenever you want lots of consistent, precise slices quickly, far faster and more evenly than slicing by hand with a knife, so they are the tool for things like thin potato slices for chips or gratins, even cucumber or tomato for salads, thin onion, apple slices, julienned vegetables for stir-fries or salads, and similar. In short, a mandoline’s purpose is quick, uniform, adjustable-thickness slicing (and shredding/julienning) of produce, giving professional-looking, consistent results in a fraction of the time a knife would take. Our Best Mandoline Slicers compares five of them.

What a mandoline slicer does

A mandoline slicer is a flat or angled board with a very sharp, fixed horizontal blade across it, and usually an adjustable mechanism that sets how far the food surface sits above the blade, which determines the slice thickness. You run the fruit or vegetable down the board and over the blade, and each pass shaves off a slice of the set thickness, so you quickly produce slice after slice all exactly the same. Many mandolines also have interchangeable or additional blades (julienne, crinkle, waffle) to cut matchsticks, ridged slices and other shapes.

So what it does is slice produce rapidly into even, precisely thick pieces, with the thickness adjustable from very thin to thicker, and often cut julienne or decorative shapes. This is its defining function: uniform, controllable slicing much faster than a knife. Understanding that a mandoline passes food over a set-depth blade to produce consistent slices explains what it is used for, any task needing many even slices or matchsticks of fruit or vegetables, done quickly and uniformly, which a knife can do but far more slowly and less consistently.

What people use them for

People use mandoline slicers for the many dishes and preparations that call for thin, even slices or matchsticks of produce. Common uses include slicing potatoes very thinly and evenly for homemade chips (crisps), French fries (with a julienne blade), gratins and dauphinoise, and layered bakes; slicing cucumbers, tomatoes, radishes and onions thinly and uniformly for salads, sandwiches and garnishes; slicing apples or other fruit evenly for tarts, crisps or drying; and shaving vegetables like fennel, carrots or beetroot thinly for salads and slaws.

They are also used to julienne vegetables into neat matchsticks for stir-fries, salads, slaws and garnishes, to make crinkle-cut or waffle slices for presentation or waffle fries, and generally to prep large quantities of uniformly sliced produce quickly, which is useful for entertaining, batch cooking or professional kitchens. The uniform thickness also means the slices cook evenly, important for chips and gratins. So a mandoline is used across many recipes wherever even, thin or matchstick-cut fruit and vegetables are wanted, especially in quantity, which is why it is a favorite for both everyday prep and more presentation-focused cooking.

Why use a mandoline instead of a knife

People use a mandoline rather than a knife when they want speed, consistency and thinness that are hard to achieve by hand. A mandoline slices much faster, you can process a pile of vegetables in moments, and every slice is exactly the same thickness, which a knife, even in skilled hands, struggles to match for large numbers of slices. This uniformity matters for even cooking (all the potato slices in a gratin cook at the same rate) and for presentation (neat, identical slices look professional).

A mandoline also cuts very thin, translucent slices consistently, which are difficult and slow with a knife, making it ideal for delicate slicing like thin chips or carpaccio-style vegetables, and the adjustable thickness and extra blades give repeatable, varied cuts (thin to thick, julienne, crinkle) that would take care and skill otherwise. So the mandoline is used when the job needs many even, thin or specially cut slices quickly, which it does better than a knife; for a few slices a knife is fine, but for quantity, consistency or very thin cuts, the mandoline is the right tool, which is what it is for. (Because the blade is very sharp, it is used carefully with its hand guard, but that does not change its purpose.)

Who uses them and how

Mandoline slicers are used by home cooks and professional chefs alike who want fast, uniform slicing. Keen home cooks use them for chips, gratins, salads and garnishes, anyone preparing produce in quantity uses them to save time, and professional kitchens rely on them for consistent, high-volume slicing and neat julienne and decorative cuts. Anyone who finds thin, even slicing by knife slow or imprecise benefits from one.

In use, you set the desired thickness (and fit the blade for the cut you want), hold the food in the hand guard or food holder, and slide it over the blade repeatedly, collecting the even slices, always keeping fingers clear of the very sharp blade and using the guard for safety. So mandoline slicers are used broadly to turn fruit and vegetables into quick, uniform, adjustable slices and matchsticks for a wide range of dishes, and the way they shave food over a set-depth blade delivers the speed, consistency and thin or specialty cuts that are the whole reason to use one, which is what mandoline slicers are used for.

The short answer

Mandoline slicers are used to cut fruit and vegetables into fast, even, uniformly thick slices, and often into juliennes, batons or crinkle cuts, by passing the food over a sharp fixed blade with an adjustable gap that sets the thickness. They are the tool whenever you want many consistent, precise slices quickly, far faster and more evenly than by knife, so people use them to slice potatoes thinly for chips, gratins and dauphinoise, cut cucumbers, tomatoes, onions and radishes uniformly for salads and garnishes, slice apples and other fruit evenly, shave fennel or carrots for slaws, and julienne vegetables into neat matchsticks for stir-fries and salads. The uniform thickness also makes the slices cook evenly, which matters for chips and gratins, and looks professional. People choose a mandoline over a knife for the speed, consistency and very thin cuts that are hard to achieve by hand, especially in quantity. Because the blade is very sharp, it is used carefully with its hand guard, but its purpose is simply quick, uniform, adjustable slicing of produce.