Crunchy peanut butter flapjacks recipe

(3186 ratings)

These crunchy peanut butter flapjacks are simple and special. They're easy to make but the peanut flavour and the extra crunch really elevates the taste.

Crunchy peanut butter flapjacks
  • healthy
Preparation Time15 mins
Cooking Time25 mins
Total Time35 mins
Cost RangeCheap
Nutrition Per PortionRDA
Calories287 Kcal14%
Sugar15.7 g17%
Fat16.7 g24%
Saturated Fat8.7 g44%
Salt0.35 gRow 4 - Cell 2
Protein3.8 g8%
Carbohydrates31.8 g12%
Salt0.35 gRow 7 - Cell 2

These crunchy peanut butter flapjacks are lovely and sticky and quick to make.

These peanut butter flapjacks are deliciously chewy and make a truly scrumptious snack. Once baked they should emerge from the oven golden but just starting to brown at the edges with a slight bounce in the middle. Don’t be tempted to cut them into bars until they’ve completely cooled in tin as this may cause them to fall apart. The great thing about flapjacks is that you can switch them up to suit your taste. If you’re feeling like chocolate or dried fruit, for instance, then simply throw a handful and stir through.


  • 300g butter or margarine
  • 200g demerara sugar
  • 100g golden syrup
  • 100g crunchy peanut butter
  • 450g porridge oats
  • 1 tsp vanilla extra
  • Icing sugar to dust




  1. Pre-heat oven to 190°C/375°F/Fan 170°C/Gas Mark 5. Grease and line a 30 x 20cm rectangular cake tin with baking parchment.
  2. Melt the butter in a large saucepan then add the sugar, syrup and peanut butter and stir over a low heat until smooth.
  3. Remove from the heat and stir in the oats and vanilla and mix well. Pile into the tin and pack down well. Bake for 25 mins until lightly golden. Cool for 10 mins before marking into 20 bars using a sharp knife. Leave to cool completely before removing from the tin.
  4. To serve, dust lightly with icing sugar. Store in an airtight container for up to a week.

Top tips for making crunchy peanut butter flapjacks

If crunchy peanut butter isn't your style, you can also use smooth peanut butter. Equally, you could swap the peanut butter for equal parts of Nutella, for a naughty twist.

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Freelance Lifestyle Writer

Miriam Habtesellasie is a freelance lifestyle writer who has contributed content to GoodTo, Woman&Home, Women and Miriam is based in London and is a fan of everything interiors, she admits to being spoilt for choice living in the capital. From stunning architecture right the way through to eye-catching department store window displays, she believes there’s always an angle to be found that can translate to our abodes.