Treacle flapjacks

(128 ratings)
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  • Serves: 12-14

  • Prep time:

  • Cooking time:

  • Costs: Cheap as chips

  • Skill level: Easy peasy

  • Child friendly
  • Freezable

Learn how to make treacle flapjacks with this simple recipe. You'll be producing flapjacks like a pro with this treacle flapjack recipe as it comes with a step-by-step recipe video to show you how it's done. This recipe makes around 12-14 flapjack bars and will take no longer than 1hr and 5 mins to prepare and make these mouth-watering treats. They're perfect for popping into packed lunch boxes, wrapping in cellophane and giving as a food gift or simply serving with a fresh cup of tea. These flapjacks are sure to become a family favourite!

Top tip: Use ordinary oats rather than jumbo rolled oats, as the smaller oats will hold together better - for good value, use economy oats.


  • 250g (8oz) butter
  • 250g (8oz) light soft brown sugar
  • 175g (6oz) black treacle
  • 500g (1lb) rolled oats
  • 18 x 28cm (7 x 11in) tray bake tin, lined with baking parchment


  1. Set the oven to 180C (gas mark 4).
  2. Cut the butter into cubes and place it in a saucepan along with the soft brown sugar and treacle. Place the pan over a low heat and stir until all the butter and sugar have melted.
  3. Pour the melted mixture into the oats and mix well. Tip the mixture into the lined tin and level it out and press it down well.
  4. Bake the tray bake in the centre of the oven for 40-50 mins, until its starting to turn a darker colour around the edges.
  5. Remove the tray bake from the oven and mark it into 12-14 fingers, then leave the flapjack to cool in the tin.
  6. When cold, use the lining paper to lift the flapjack out of the tin and then cut or break along the marked lines.

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Nutritional information

Guideline Daily Amount for 2,000 calories per day are: 70g fat, 20g saturated fat, 90g sugar, 6g salt.

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  • 3
(128 ratings)

Your comments


I made these with great success- I used conventional oven temp settings to avoid any risk of burning, & probably only cooked for 35 mins. Great taste, great success. I did this after reading the one off comment 'burnt to a cinder' & suspected too high a temperature, or cooked for too long. An impressive recipe. Thank you.


Did you use a fan forced oven? I'm interested to know, as I find mine cooks very quickly and I'm thinking of making these with the non-fan force setting.

Fiona Haygreen

Burnt to a cinder!! What a waste of expensive ingredients!!

Charlotte Urquhart

Cooked for 40 mins and they were black, burnt and crumbly. Would definitely try these again as love treacle, just set timer for 2 mins and keep watch I guess.

Vicky Mills

These are the only flapjacks i make now. All my family love them! nice and chewy


Mmmm mmmm chewy stunningly good flapjack with a really good toffee taste.

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