Why did my flapjack fall apart?

There is no structural ingredient in a flapjack. The oats are held by a caramel of butter, sugar and golden syrup that is liquid when hot and brittle when cold, so everything about handling it depends on temperature. It is fragile and floppy in the tin at ten minutes, sliceable at forty, and solid at two hours — and the mistake nearly everyone makes is trying to remove it somewhere in the first two of those windows.

What you'll need

• Golden syrup
• A lined shallow tin
• A palette knife or the back of a spoon

Step by step

1. Check the syrup content.Golden syrup is the binder — it does not crystallise as it cools, so it stays sticky where sugar alone would go brittle and shatter. A recipe short of syrup, or one where syrup was replaced entirely with sugar, will crumble.
2. Get the ratio roughly right.A dependable flapjack runs close to equal weights of butter, sugar-plus-syrup, and oats, or slightly more oats. Push the oats much beyond that and there is not enough syrup to coat them.
3. Use the right oats.Rolled porridge oats bind well. Jumbo oats look good but have far less surface area for the syrup to grip, so a jumbo-oat flapjack is much more fragile. A mix of the two is a good compromise.
4. Press it down hard.Firmly and evenly, right into the corners, with the back of a spoon or a palette knife. Compaction is a structural ingredient here. A loosely spread mixture bakes into a loose slab.
5. Do not over-bake.Golden at the edges and still soft and slightly wobbly in the middle. An over-baked flapjack goes hard and then crumbles as the dried oats separate from the caramel.
6. Score warm, cut cold.Mark the bars with a knife about ten minutes out of the oven while it is still soft. Then leave it in the tin until completely cold — an hour or two — before cutting through and lifting out.
7. Line the tin so you can lift the whole slab.Parchment up two sides gives you handles. Lifting the whole cold slab out and cutting it on a board is far easier than digging bars out of a tin.

Tips

• A shallower tin gives a thicker, better-bound bar than spreading the same mixture thin. Thin flapjack crumbles more.
• Chilling the cooled slab for half an hour before cutting gives clean edges, especially with a chocolate topping.
• Crumbled flapjack is a genuinely good crumble topping, yoghurt topping or ice-cream base. It is not wasted.
• Adding a beaten egg is sometimes suggested as a binder. It works but it makes a cakey oat bar rather than a flapjack.

Common mistakes

• Spreading the mixture rather than pressing it — Flapjack is compacted, not levelled. Loose mixture bakes with air between the oats and no amount of syrup will bridge it.
• Cutting it while hot to get neat bars — The caramel is still liquid so the cuts close up and the bars deform, then break when lifted. Score hot, cut cold.

If it doesn't work