Delia Smith Flapjacks​ Recipe​

These classic British flapjacks are rich, buttery oat bars with a deep caramel flavour from golden syrup and a hint of treacle. The texture is exactly what you want: chewy in the middle with lightly crisp, golden edges. It is a simple, beginner-friendly bake with no mixer needed, just a saucepan and a spoon. Total time is about 50 minutes, including enough cooling time to slice neatly.

Ingredients

For the flapjack base

• 175g unsalted butter, plus extra for greasing
• 175g demerara sugar (or light brown sugar)
• 2 tbsp golden syrup (about 40g)
• 1 tbsp black treacle (or use extra golden syrup)
• 350g rolled oats (porridge oats)
• 1/2 tsp fine sea salt (optional, but recommended)

Optional mix-ins

• 75g raisins or sultanas
• 50g chopped nuts (almonds, hazelnuts, or pecans work beautifully)

How to Make Delia Smith Flapjacks​ Recipe​

Prepare the tin and oven

• Prepare the oven: Preheat the oven to 180°C (160°C fan). Position a shelf in the middle so the flapjacks bake evenly.
• Line the tin: Grease a 20cm square tin, then line it with baking parchment, leaving a little overhang to lift the flapjacks out later.

Melt the syrup mixture

• Melt the butter gently: Add the butter to a saucepan and melt over low heat so it stays smooth and doesn’t split.
• Dissolve the sugar: Stir in the demerara sugar, golden syrup, and treacle. Keep the heat low and stir until the mixture looks glossy and the sugar has mostly dissolved.
• Take it off the heat: Once everything is smooth, remove the pan from the heat so the oats don’t toast too quickly in the saucepan.

Mix, press, and bake

• Stir in the oats: Tip in the rolled oats and the salt (if using). Mix thoroughly until every oat is coated and the mixture looks evenly damp.
• Add any extras: Fold in raisins and/or chopped nuts if you like, keeping the mix-ins evenly distributed.
• Press into the tin: Spoon the mixture into the prepared tin and press down firmly into an even layer. A silicone spatula or the back of a spoon works well.
• Bake: Bake for 20 to 25 minutes. The edges should be golden, while the centre will still look slightly soft, which is perfect for chewy flapjacks.

Cool and slice

• Cool briefly, then score: Let the flapjacks cool in the tin for 10 minutes, then score into 16 squares while they are still warm. This helps you get neat edges later.
• Cool completely: Leave the flapjacks in the tin until fully cool and firm. This is the key to flapjacks that hold together.
• Lift out and cut: Use the parchment overhang to lift onto a board, then cut through the scored lines with a sharp knife.

Tips

Why did my flapjacks turn out crumbly?

Crumbly flapjacks usually come from cutting too soon or not pressing the mixture firmly enough into the tin. Score while warm, then cool completely before slicing, and press down well before baking.

How do I make them chewier (not crunchy)?

Bake on the shorter end of the time range (around 20 minutes) and remove them as soon as the edges are lightly golden. Overbaking dries them out and turns them crisp.

How do I stop flapjacks sticking to the tin?

Grease the tin even if you are lining it, and use parchment with an overhang. Let the bars cool fully before lifting out, since warm flapjacks are softer and more likely to tear.

Can I add chocolate without it melting into a mess?

Yes. Let the flapjacks cool completely first, then drizzle with melted chocolate, or stir in chocolate chips once the mixture has cooled for a minute or two off the heat.

Serving Suggestions

• With a mug of strong tea or coffee for an easy afternoon treat
• Packed into lunchboxes with an apple or banana
• Crumble a square over Greek yogurt and berries
• Warm slightly and serve with vanilla ice cream as a quick dessert

Storage

Room Temperature

Store flapjacks in an airtight container for up to 5 days. If you like them on the softer side, keep them layered with baking parchment and away from direct heat.

Refrigerator

You can refrigerate them for up to 7 days, but the texture will firm up. Bring to room temperature before eating for the best chew.

Freezing

Freeze in a single layer until solid, then transfer to a freezer bag or container with parchment between layers. Freeze for up to 3 months. Thaw at room temperature for 1 to 2 hours.

Nutrition

Per 1 square (based on 16): Calories: 210 kcal, Carbohydrates: 26g, Protein: 3g, Fat: 11g, Saturated Fat: 6g, Sodium: 90mg.

Disclaimer: Nutrition values are estimates and will vary based on ingredients and portion size.

FAQs

Delia Smith Flapjacks Recipe

Recipe by Temp User

0.0 from 0 votes

Course: Snack, DessertCuisine: BritishDifficulty: Easy

Servings

16

squares

Prep time

10

minutes

Cooking time

22

minutes

Total time

50

minutes

Calories

210

kcal

32

minutes

Chewy, buttery British flapjacks made with rolled oats, golden syrup, and a touch of treacle for that deep caramel finish.

Ingredients

• 175g unsalted butter, plus extra for greasing

• 175g demerara sugar (or light brown sugar)

• 2 tbsp golden syrup (about 40g)

• 1 tbsp black treacle (or use extra golden syrup)

• 350g rolled oats (porridge oats)

• 1/2 tsp fine sea salt (optional, but recommended)

• 75g raisins or sultanas (optional)

• 50g chopped nuts (optional)

Directions

• Preheat the oven to 180°C (160°C fan). Grease and line a 20cm square tin with baking parchment.
• Melt the butter in a saucepan over low heat. Stir in the sugar, golden syrup, and treacle until glossy and smooth.
• Take off the heat and stir in the oats (and salt), mixing until every oat is coated.
• Fold in raisins and/or nuts if using.
• Tip into the tin and press down firmly into an even layer.
• Bake for 20–25 minutes until the edges are golden and the centre looks set but still a little soft.
• Cool in the tin for 10 minutes, then score into squares. Leave to cool completely before lifting out and cutting.

Notes

• For chewier flapjacks, bake closer to 20 minutes. For firmer, crunchier bars, bake closer to 25 minutes.
• Press the mixture firmly into the tin so the bars slice cleanly and hold together.
• Always cool completely before cutting, or the flapjacks may crumble.