This is a guest post by Sarah from SarahsCakeBlog.

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For the Cookies

500g Plain Flour (All Purpose Flour) 

2 ½ tsp Biacarbonate of Soda

300g Light Brown Sugar

100g Granuled Sugar (castor sugar)

250g Unsalted Butter

3 Large Eggs

2tsp Vanilla Extract 

200g Milk chocolate chips 

200g Dark chocolate Chips 

266g M&M

For the Buttercream

300g Icing Sugar (Powdered Sugar)

150g Unsalted Butter

1tsp Vanilla Extract 



1. Preheat your oven to 180C (160C fan) and line a three 8”cake tin. Leave to one side. 

2. In a bowl add all the dry ingredients and mix so they are all incorporated

3. In a separate bowl add the butter, eggs and vanilla and mix until they are all incorporated.

4. Add the wet ingredients to the bowl of dry ingredients and mix. The mixture should be very thick. 

5. Add in the chocolate chips and the M&Ms and fold them through. I find the best way to fold is to use a spatula and mix in a figure of 8 until the chocolate chips and M&Ms are all evenly distributed. 

6. Split the mixture between the three baking tins and bake in the oven for 25-30 minutes, until the top of the cookie looks ‘dry’ and a skewer comes out clean. 

7. Leave the cookies to cool in the tins for 10-15 minutes and then leave to fully cool on a wire rack. 

8. For the buttercream, mix together the sugar, butter and vanilla until thick, pale and creamy. 

9. Place the first cookie onto a plate. Pipe the icing onto the first cookie, I used a Wilton 2D Piping Tip.

10. Place the second cookie on top of the first and again pipe the icing on top. 

11. Finally add the third cookie on top of the first and second and pipe the buttercream on top. 

12. Finish with some sprinkles.

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