What are microwave splatter covers used for?

Microwave splatter covers are used to cover food while it heats in the microwave so that it does not spit and splatter all over the inside of the microwave. You place the cover (a lightweight, vented lid, usually plastic or silicone) over your plate or bowl, and as the food heats, any spattering, from bubbling sauces, fat, or steam blowing bits of food, is caught by the cover instead of hitting the microwave walls, roof and turntable. So their main purpose is to keep the microwave clean by containing the mess. At the same time, covering the food traps steam, which helps it heat more evenly and stops it drying out, while the cover’s vents let excess steam escape so the food does not boil over or the cover pop off. So a splatter cover is used to keep the microwave clean and help food heat better, which is why it is such a handy, simple accessory. Our Best Microwave Splatter Covers compares five of them.

Keeping the microwave clean

The primary use of a microwave splatter cover is preventing mess, which is where its name comes from. When you heat food uncovered, especially saucy, fatty or moist foods, it tends to spit and splatter as it bubbles and as steam escapes, flinging food and grease onto the microwave’s interior walls, roof, door and turntable, which then bakes on with further heating and is a chore to clean. A splatter cover placed over the food catches all that spatter, so the mess stays on the cover (which is easy to wash) rather than coating the microwave.

This keeps the microwave interior clean, saving you from frequent scrubbing of baked-on food splatters, which is a real, everyday convenience, cleaning a cover is far easier than cleaning the whole microwave. So people use a splatter cover simply to stop food making a mess of the microwave every time they heat something that spits. Understanding that it is a shield between the food and the microwave explains its core purpose: containing splatter to keep the appliance clean, which alone makes it a worthwhile, much-used item for anyone who reheats food regularly.

Heating food better

Beyond preventing mess, a splatter cover is used because covering the food helps it heat better. Covering traps steam and heat around the food, which helps it heat more evenly, reducing cold spots and helping the food warm through more consistently than uncovered, where moisture escapes and edges can overheat while the center lags. The trapped steam effectively helps cook and reheat the food more uniformly, which is a genuine cooking benefit, not just a cleanliness one.

The trapped moisture also stops food drying out: uncovered food in a microwave loses moisture as steam and can become dry, rubbery or hard at the edges, whereas a cover keeps moisture in, so leftovers and dishes stay moister and more palatable. This is especially useful for reheating things like rice, pasta, vegetables and leftovers that you want to stay moist. So people use a splatter cover not only to keep the microwave clean but to get more evenly heated, less dried-out food, two benefits from the one simple act of covering. This dual purpose is why many prefer a dedicated splatter cover to leaving food uncovered.

Venting steam

A splatter cover is designed to vent steam, and this venting is part of what it is used for, letting it cover food without causing problems. The cover has vent holes or a raised design that allows excess steam to escape rather than building up pressure underneath. This matters because fully sealing food in the microwave can cause steam pressure to build and the food to boil over or the cover to pop or lift, and sealed containers can even be unsafe, so the vented cover strikes the balance: it traps enough steam to heat the food evenly and keep it moist, while letting surplus steam out so nothing boils over or bursts.

So the cover is used specifically because it covers the food (for cleanliness and even, moist heating) while safely venting, which a tightly sealed lid or wrap would not do as well. This makes it the sensible way to cover food in the microwave: you get the splatter protection and the even, moist heating without the boil-overs or pressure issues of a sealed cover. The venting, often through holes or a vented knob, is a deliberate feature that lets the splatter cover do its job properly, which is why vented splatter covers are the standard tool for covering microwaved food.

How they are used and who uses them

A microwave splatter cover is used simply: you place it over the plate or bowl of food before microwaving, heat as normal, then lift it off (carefully, as it and the steam are hot) when done, and wash the cover afterward. Many are collapsible or dome-shaped to store compactly and to fit over various dish sizes, and most are dishwasher safe for easy cleaning. Some have handy features like a steam-vent knob or handle. You reuse it every time you heat food that might splatter or that you want to keep moist.

They are used by basically anyone who uses a microwave regularly, since reheating food is where splatter and drying happen, so home cooks, households reheating leftovers, offices and anyone wanting to keep their microwave clean all benefit. So microwave splatter covers are used broadly as a simple, everyday accessory to cover food while microwaving, keeping the microwave clean, heating food more evenly, and preventing it drying out, all while venting steam, which together are exactly what they are for and why they are such a common, practical kitchen item.

The short answer

Microwave splatter covers are used to cover food while it heats so it does not spit and splatter all over the inside of the microwave. You place the vented cover over your plate or bowl, and it catches the spattering from bubbling sauces, fat and steam, so the mess stays on the easy-to-wash cover instead of baking onto the microwave walls, roof and turntable, which keeps the microwave clean and saves you scrubbing it. At the same time, covering the food traps steam, which helps it heat more evenly, reducing cold spots, and keeps moisture in so the food does not dry out and turn rubbery, both real benefits for reheating leftovers, rice, vegetables and similar. The cover’s vents let excess steam escape so the food does not boil over and no pressure builds up, striking the balance a sealed lid would not. So a splatter cover’s purpose is to keep the microwave clean while helping food heat evenly and stay moist, which is why it is such a handy, widely used accessory for anyone who reheats food.