Classic British Flapjack
Chewy, buttery oat flapjacks are simple traybake bars made with rolled oats, golden syrup, brown sugar, and butter. They are quick to mix, easy to slice, and just right for lunchboxes, tea breaks, or an after-school bake
Total
40 min
Servings
16 squares
Level
Easy
In the UK, a flapjack is not a pancake. It is a simple oat bar baked in a tin until golden at the edges and soft in the middle. The texture lands somewhere between a granola bar and a cookie, with plenty of buttery chew.
This recipe uses the classic mix of rolled oats, golden syrup, butter, and brown sugar. Golden syrup gives flapjacks their familiar caramel flavor and helps hold the oats together.
The key is not to overbake them. Flapjacks firm up as they cool, so take them out when the top looks golden and the center still feels a little soft.
01What you'll need
Ingredients
6 items · 16 squares
- 200 g unsalted butter, plus extra for greasing
- 150 g light brown sugar
- 4 tablespoons golden syrup
- 1/4 teaspoon fine salt
- 350 g rolled oats, also called old-fashioned oats
- 1 teaspoon vanilla extract, optional
02How to make it
Step-by-step
1. Heat the oven
Preheat the oven to 180°C/160°C fan/350°F. Grease a 20 cm square baking tin with butter, then line it with baking paper. Leave a little paper hanging over the sides so you can lift the flapjack out later.
2. Melt the butter mixture
Put the butter, brown sugar, golden syrup, and salt in a medium saucepan. Warm over low heat, stirring now and then, until the butter has melted and the sugar has mostly dissolved. Do not let it boil hard.
3. Stir in the oats
Take the pan off the heat. Stir in the vanilla, if using, then add the oats. Mix until every oat is glossy and coated. This helps the flapjack hold together after baking.
4. Press into the tin
Tip the oat mixture into the lined tin. Spread it into an even layer, then press it down firmly with the back of a spoon or a spatula. Firm pressing gives you neat, compact squares.
5. Bake until golden
Bake for 22 to 25 minutes, until the edges are golden and the top looks set. The middle may still feel soft if you press it gently. That is normal and helps keep the flapjack chewy.
6. Score while warm
Let the flapjack cool in the tin for 10 minutes. While it is still warm, use a sharp knife to mark 16 squares. Scoring means cutting shallow lines so the bars are easier to slice later.
7. Cool completely
Leave the flapjack in the tin until completely cool. This can take 1 to 2 hours. Lift it out using the baking paper, then cut along the scored lines into squares.
03From our kitchen
Cook's tips
- Make ahead: Flapjacks are a good make-ahead bake. They taste great the next day once the oats have settled and the texture has firmed up.
- Storage: Keep cooled flapjacks in an airtight container at room temperature for up to 5 days. Put baking paper between layers if stacking them.
- Freezing: Freeze the cut squares in a sealed container for up to 2 months. Thaw at room temperature for about 1 hour before serving.
- Oat swap: Rolled oats give the best chewy texture. Quick oats can make the bars softer and more compact. Avoid steel-cut oats, which will stay too hard.
- Golden syrup swap: If you cannot find golden syrup, use light corn syrup or honey. Honey has a stronger flavor and can make the flapjack a little softer.
- Add-ins: Stir in up to 75 g raisins, chopped dried apricots, chocolate chips, or seeds with the oats. Too many add-ins can make the bars crumble, so keep the amount modest.
Cook's note
For a firmer, crisper flapjack, bake for 3 to 5 minutes longer, watching closely so the edges do not burn. For a softer, chewier bar, stay near the lower end of the baking time and cool fully before slicing.
04Frequently asked
Questions & answers
Why did my flapjacks fall apart?
They may not have been pressed firmly enough into the tin, or they may have been sliced before fully cool. Use rolled oats, coat them well in the syrup mixture, press down hard, and let the tray cool completely.
Can I make flapjack without golden syrup?
Yes. Light corn syrup is the closest swap for texture. Honey also works, but it brings a stronger flavor and can make the bars slightly softer.
How do I make flapjacks less sweet?
You can reduce the brown sugar by about 25 g, but do not cut too much syrup because it helps bind the oats. Adding a small pinch more salt can also balance the sweetness.
Can I add chocolate on top?
Yes. Melt about 150 g chocolate and spread it over the cooled flapjack. Let it set before cutting. If you want clean slices, score the chocolate while it is partly set, not rock hard.
Are these the same as American flapjacks?
No. In American English, flapjacks usually means pancakes. This recipe is for British flapjack, a baked oat traybake cut into squares.
05Keep cooking
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