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M&M’s Chocolate Flapjacks

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Yes M&M’s chocolate flapjacks are a thing! Chewy delicious oats topped with creamy milk chocolate and a scattering of tasty M&M’s. Easy and luscious!

I don’t know about you but I just love a sweet, chocolatey, oats snack to eat whilst I drink coffee and this flapjack tray bake is just perfect.

The kids pester me to make these all the time because they just taste so good!

A layer of chewy oats, topped with delicious creamy milk chocolate and then finished with a generous topping of M&M’s. They’re super easy to make, take hardly any time and are just so very moreish.

stack of M&M's chocolate flapjacks on a blue plate

M&M’s Chocolate Flapjack Ingredients

ingredients for M&Ms Chocolate flapjacks, oats, ready brek, chocolate, butter, syrup and brown sugar along with pack of M&M's
  • 150g Butter 
  • 50g Soft Brown Sugar 
  • 2 tbs Golden Syrup 
  • 220g Rolled Oats 
  • 50g Ready Brek Instant Porridge 
  • 200g Chocolate 
  • Pack of M&M’s (we use the 133g packs)

How to make M&M’s chocolate flapjacks

  • Preheat the oven to 180C 
  • Grease and line 20cm square tin with butter and baking paper. You don’t need to be super neat here, just whack it in.
square prestige baking tin lined with brown baking paper
  • Add the butter, brown sugar and golden syrup to a large deep pan and melt all the ingredients together over a low heat on the hob. Stir gently.
Le creuset black saucepan with brown sugar, syrup and butter in the bottom being stirred with a wooden spoon
  • Once everything has completely melted and is all stirred together remove the pan from the heat.
Le Creuset saucepan with melted butter, syrup and sugar in the bottom. Bowl of oats and ready brek next to it
  • Tip in the porridge oats and Ready Brek.
ready brek and oats tipped into a pan of melted butter, brown sugar and syrup
  • Mix the oats into the melted butter mixture until all the oats are well coated.
Le Creuset saucepan with oats stirred into melted butter, brown sugar and golden syrup
  • Tip the flapjack mixture into the lined baking tin.

Get Our Delicious Banana Flapjacks Recipe Here

flapjack mixture tipped into square baking tin
  • Press the mixture down firmly into the tray using the back of a spoon. Smooth the top over so it’s flat. Then bake in the oven for 15 minutes.
buttery oats all pressed down in square baking tin
  • Once the flapjack base is cooked – remove from the oven and leave on a wire rack to cool for around an hour.
  • Once the flapjacks are cooled melt the chocolate ready for topping. Do this by breaking the chocolate into chunks and putting it into a jug, stand the jug in a pan of boiling water and stir carefully until fully melted.
  • Pour the chocolate onto the flapjacks.
chocolate poured onto top baked flapjack
  • Then using the back of a spoon simply spread the chocolate across the top of the oats so the whole top is covered in chocolate.
chocolate spread all over top of flapjacks
  • Next sprinkle over the M&M’s, press them slightly into the chocolate that way as the chocolate sets in the fridge the M&M’s will be embedded nicely.
coloured M&M's sprinkled over the top of chocolate coated flapjacks
  • Put the M&M’s chocolate flapjacks into the fridge to set – this usually takes around an hour.
  • Then remove the from the fridge and slice them carefully into 12 pieces. Again, you don’t need to be super neat here – these are a rustic little treat!
M&M's Chocolate Flapjacks cut into 12 pieces

How to store flapjacks?

M&M's Chocolate Flapjacks cut into 12 pieces

I store the flapjacks in an air tight container in the fridge. They’ll stay good for around 5 days but you’ll probably never find out as they’ll all be eaten way before then!

More flapjack recipes to try

  • Chocolate coconut flapjacks – easy flapjack recipe bursting with delicious coconut and topped with creamy milk chocolate – so good!
  • Blueberry flapjacks – a delicious chewy flapjack recipe studded with jammy blueberries and drizzled with white chocolate.
  • Cranberry flapjacks – super rich and tasty cranberry and white chocolate flapjacks with a festive vibe!

Find out how to make flapjacks and five incredibly tasty flapjack recipes here!

Love M&M’s recipes? Try these….

stack of M&M's chocolate flapjacks on a blue plate
Yield: Makes 12

M&M's Chocolate Flapjacks

stack of M&M's chocolate flapjacks on a blue plate

Super easy homemade chocolate flapjacks topped with M&M's

Prep Time 15 minutes
Cook Time 15 minutes
Additional Time 2 hours
Total Time 2 hours 30 minutes


  • 50g Unsalted Butter
  • 50g Soft Brown Sugar
  • 2 tbs Golden Syrup
  • 220g Rolled Oats 
  • 50g Ready Brek Instant Porridge
  • 200g Milk Chocolate 
  • 133g M&M's  


  1. Heat the oven to 180C and grease and line a 20 inch baking tin.
  2. Melt the butter, sugar and syrup in a large saucepan over a low heat.
  3. Remove from the heat and then stir in the oats and instant porridge.
  4. Tip the flapjack mixture into the tin and press down with a spoon.
  5. Bake at 180C for 15 minutes then once cooked, leave to cool on a wire rack.
  6. Melt the chocolate - break into pieces in a small bowl or jug and stand in hot water - stirring until melted.
  7. Then tip the chocolate onto the flapjacks and spread over the top. Sprinkle on the M&M's.
  8. Put the flapjacks into the fridge to set.
  9. Remove after an hour or so and cut into 12 pieces.

Nutrition Information:



Serving Size:


Amount Per Serving: Calories: 271Total Fat: 12gSaturated Fat: 7gTrans Fat: 0gUnsaturated Fat: 4gCholesterol: 15mgSodium: 27mgCarbohydrates: 37gFiber: 3gSugar: 21gProtein: 4g

Nutritional content will vary depending on the exact ingredients you use and how careful you are with measuring - this nutritional information is given as a general guide only and may not be accurate - you should always calculate your own nutritional information especially if you have specific dietary requirements.

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stack of M&M's chocolate flapjacks on a blue plate. Text "M&M's chocolate flapjacks"

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