Appliances & Heat

Microwave

Fast reheating, steaming, and melting on demand

Heats food from the inside out for quick reheating, steaming vegetables, and melting butter or chocolate. Cover dishes loosely to trap steam, and stir or rotate partway through to even out hot spots.

The microwave heats food from within by bombarding it with electromagnetic waves that agitate water molecules, generating heat through friction — which is why it warms the inside as readily as the surface and works so fast. It is the kitchen's great convenience: reheating leftovers, steaming vegetables, melting butter and chocolate, softening cold ingredients, and warming a mug of milk in seconds rather than minutes. What it doesn't do is brown or crisp, because it never gets the surface hot and dry the way a flame or element does.

Used thoughtfully, it's more capable than its reputation suggests. Loosely covering a dish traps steam and heats food more evenly; stirring or rotating partway through smooths out the hot and cold spots microwaves are notorious for. It steams vegetables and fish beautifully, blooms spices, proofs dough gently, and tempers chocolate in careful bursts. The trick is to work in short intervals and check often, since microwave energy concentrates unevenly and overshoots fast.

Types & varieties

Countertop microwave

The standard standalone box. Simplest and cheapest, takes counter space; the workhorse for reheating and steaming.

Over-the-range / built-in

Mounted above the cooktop (often with a vent hood) or integrated into cabinetry. Saves counter space and looks tidy, at a higher cost.

Convection microwave

Adds a heating element and fan so it can also bake, roast, and brown — a small combo oven that crisps where a plain microwave can't.

Inverter models

Deliver true continuous low power instead of pulsing on and off, for gentler, more even defrosting and melting.

How to use it well

Cover, stir, and use the right power level. Lower power and short bursts beat blasting on high for anything delicate or thick.

Cover dishes loosely (a lid ajar or vented wrap) to trap steam and heat evenly
Stir or rotate food halfway through to break up the cold and hot spots microwaves leave
Drop the power level for melting chocolate, softening butter, and reheating dense or eggy foods
Add a splash of water to reheating rice, pasta, or vegetables so they steam instead of drying out

Safety and what not to do

Microwaves react badly to metal and to sealed, superheatable things. A few hard rules keep it safe.

No metal, foil, or metal-trimmed dishes — they arc and can spark a fire
Pierce or vent skins and sealed items (potatoes, sausages, egg yolks) so they don't burst
Never microwave a whole egg in its shell, and beware superheated water that can erupt when disturbed
Let covered dishes stand a moment, then lift the lid or wrap away from your face — trapped steam escapes in a scalding burst; stir microwaved liquids before drinking to even out superheated hot spots
Use microwave-safe glass or ceramic; some plastics warp or leach when heated

Common uses

Reheating leftovers and cooked mealsSteaming vegetables and fishMelting butter, chocolate, and chocolate ganacheSoftening cold butter and cream cheeseWarming milk, sauces, and beveragesBlooming spices and toasting small amounts of nutsCooking quick mug cakes and oatmealDefrosting frozen ingredients gently

Tips & pitfalls

Arrange food in a ring with a gap in the center — the middle of a full plate always heats slowest.
It steams vegetables better than most people realize: a splash of water, a cover, a couple of minutes.
Soften brown sugar or stale bread with a damp paper towel and a short burst.
Melt chocolate in 20–30 second bursts at half power, stirring between — it scorches in a blink on high.
Heat a damp lemon in a bowl of water for a few minutes to loosen splatters and deodorize the cavity.

Good to know

How it works: Microwaves agitate water molecules to heat food from inside
Power: 700–1,200 W (higher = faster, more even)
Strength: Reheating, steaming, melting — fast and hands-off
Limitation: Doesn't brown or crisp; heats unevenly without stirring
Care: Wipe spills promptly; steam-clean with lemon water; keep the door seal clean
Best for: Reheating, steaming veg, melting butter/chocolate