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Slow Cooker Chocolate Flapjacks
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5 from 3 votes

Slow Cooker Chocolate Flapjacks

A chocolatey bake perfect for using up leftover Easter eggs or chocolate bars
Course Baking
Cuisine Slow Cooker
Prep Time 5 minutes
Cook Time 2 hours 30 minutes
Total Time 2 hours 35 minutes
Servings 12
Calories 388kcal


  • 250 g oats rolled
  • 250 g unsalted butter
  • 200 g light brown sugar I used muscovado
  • 2 tbsp golden syrup
  • 4 tsp cocoa powder
  • chocolate I used one large Easter egg shell, two small chocolate rabbits and a handful of Aero bubbles


  • Melt together the butter, sugar and golden syrup in a pan over low heat.
  • In a large bowl, stir the cocoa powder into the oats.
  • Once the butter, sugar and golden syrup is all melted together and smooth, pour it over the oats in the bowl and mix well until it is all combined.
  • Line your slow cooker pot with a couple of layers of baking paper (one to lift the flapjacks out with, one to protect from burning). I used an oval 3.5 litre slow cooker for this recipe.
  • Press the mixture into the pot, so it is an even depth and roughly smooth.
  • Place a tea towel or some kitchen rolls squares under the lid to catch drips and put on the lid.
  • Cook on high for two hours or until the edges have started to firm and the centre of the flapjacks bubble slightly.
  • After two hours, put your broken up chocolate on top of the flapjack mixture and cook on high for another half an hour, so the chocolate melts in slightly.
  • Remove from the pot using the baking paper edges to pull it out carefully, then place on a cooling rack and allow to cool and become firm for 2-3 hours.
  • Once cool and firm, slice into 12 pieces.


I made this recipe in an oval 3.5 litre slow cooker. If you have a larger slow cooker you may wish to double the recipe so it is not too thin. If you have a round slow cooker then your mixture will be thicker too.


Calories: 388kcal | Carbohydrates: 43g | Protein: 3g | Fat: 24g | Saturated Fat: 14g | Cholesterol: 44mg | Sodium: 10mg | Potassium: 155mg | Fiber: 3g | Sugar: 27g | Vitamin A: 520IU | Calcium: 34mg | Iron: 1.5mg