Treacle flapjacks Recipe

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  • Nut-free
  • Vegetarian


12 - 14






15 min


50 min

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. The sticky sweet treacle flavour works wonders with the rolled oats. 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!


  • 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


  • Set the oven to 180°C (gas mark 4).

  • 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.

  • 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.

  • Bake the tray bake in the centre of the oven for 40-50 mins, until it’s starting to turn a darker colour around the edges.

  • Remove the tray bake from the oven and mark it into 12-14 fingers, then leave the flapjack to cool in the tin.

  • 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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Top Tip

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