Why won't my chocolate melt — and what to do when it seizes

Melting chocolate looks like the easiest step in any recipe, right up until it turns into a stiff, grainy paste in front of you. There are three distinct failures, they have different causes, and knowing which one you are looking at tells you whether it can be saved.

Failure 1: it seized — stiff, grainy, dull

You were stirring smooth melted chocolate and it suddenly thickened into something like wet sand. This is seizing, and it is almost always caused by a tiny amount of water.

Chocolate is cocoa solids and sugar suspended in cocoa butter — essentially a dry mixture held in fat. Introduce a few drops of water and the sugar particles dissolve and glue themselves to each other, pulling the whole thing into clumps. A wet spoon, a damp bowl, or a single drop of steam from a bain-marie is enough.

The counterintuitive fix: add more liquid, not less. A few drops will seize it; enough liquid dissolves the sugar completely and brings it back to a smooth sauce. Stir in 1 tablespoon of boiling water at a time until it goes glossy again.

Important caveat: rescued chocolate will not set hard again. It is now a ganache-style sauce. Perfect for drizzling, pouring over bread cups, or stirring into a batter — useless for a snapping chocolate shell.

Failure 2: it burned — thick, dull, smells bitter

Chocolate scorches easily. Dark chocolate starts to burn around 50 °C, and milk and white chocolate lower still, because the milk solids catch first.

Burnt chocolate turns thick and grainy like seized chocolate, but it also smells acrid and tastes bitter. This one cannot be rescued. Throw it out and start again — no amount of liquid or extra chocolate will remove the burnt flavour.

Prevention is all method:

• Microwave: 20–30 second bursts at medium power, stirring between each. Stop while a few lumps remain — residual heat finishes them. Chocolate holds its shape when melted, so it can be fully molten and still look solid; if you wait until it looks melted, you have gone too far.
• Bain-marie: a bowl over barely simmering water, the bowl not touching the water. Take it off the heat when most of it has melted.

Failure 3: it never melted properly — chocolate chips holding their shape

This one surprises people and is not a mistake at all.

Chocolate chips are designed not to melt. They contain less cocoa butter and added stabilisers specifically so they keep their shape inside a cookie. Heat them in a bowl and they soften but often stay lumpy and never go properly fluid.

For anything you need to pour, dip or coat — use a chopped chocolate bar, not chips. More cocoa butter, no stabilisers, and it flows properly. Chips are for folding into dough; bars are for melting.

The rules that prevent all three

1. Everything bone dry. Bowl, spatula, the lot. Dry them properly, not just "mostly".
2. Chop it evenly. Big chunks mean the small pieces burn while you wait for the large ones.
3. Low and slow. There is no advantage to speed here.
4. Stop early. Pull it off the heat while lumps remain and stir them out with residual warmth.
5. Use a bar, not chips, for anything that needs to flow.

When a recipe adds milk or cream on purpose

Worth clearing up, because it looks like a contradiction. Recipes that melt chocolate with milk, cream or butter are not breaking the water rule — they add enough liquid to form a stable emulsion rather than the few stray drops that cause seizing.

The danger zone is small amounts. Either keep it completely dry, or commit to a proper quantity of liquid. Our chocolate bread cups take the second route: chocolate melted with milk, which is why it pours and coats rather than setting into a shell.

Quick diagnosis

• Grainy, stiff, smells fine → seized. Add boiling water a spoonful at a time.
• Thick, dull, smells bitter or burnt → scorched. Start again.
• Soft but lumpy, won't go fluid → chocolate chips. Use a chopped bar instead.