Chocolate chip and marshmallow cookie bar recipe!


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I had never seen or eaten these before I made them. I’m not saying they’ve never been done, just that I hadn’t come across it! 

As much as I’d love to sit here and say I was the first, let’s face it, is there anything that hasn’t been done before by somebody, somewhere?

When I was really young and at primary school, we made bread in class. We got to put whatever ingredients we wanted into it, and I chose smarties and marshmallows! 

I remember my family and the teachers and everybody over the age of about 7 or whatever I was at the time, they all loved it. When I say they loved it, I mean they did that thing that any decent adult would when a child has an idea or tries to make something, and they say, “oh wow that’s fantastic! Marshmallows and smarties in bread, yum!” (Obviously thinking about what on earth they would put inside a sandwich that would go with marshmallows and smarties…) And then when I offered some to them they’d politely decline saying that I should get to eat it because I made it. Well all I can say is don’t knock it til you’ve tried it because that stuff was amazing!

I think it was because recently I made some smarties cookies, and it must have just reminded me of the bread that I made when I was small, and how the marshmallows melted and tasted amazing with the bread, so it gave me the idea of putting them in cookies! 

I didn’t want to make another batch of cookies and only add one ingredient, so I decided to have a go at cookie bars for the first time. I used exactly the same basic recipe as with the smarties cookies, but I added cocoa powder, replaced the smarties for marshmallows and chocolate chips, and baked in one piece in a square tin rather than Individual pieces. Not exactly the same then is it? I know.

I’m not gonna lie, the first attempt went in the bin, purely because of it not being baked for long enough, but I’ve shared the tips with you for how to know when it’s cooked and ready! My f**k ups mean you get it right first time, so you can thank me later! 


100g caster sugar 

125g brown sugar 

125g softened butter/stork

225g self raising flour

1 egg

2 table spoons cocoa powder

75g chocolate chips

75g marshmallows


To prepare, preheat oven 180 degrees, and line a standard 9x9in square baking tin with greaseproof paper.

1. Place sugar and butter in a mixing bowl, and mix together with an electric hand whisk.

2. Add the egg and mix.

3. Sift in the flour and cocoa powder and mix.

4. Place the marshmallows and chocolate chips in the mixing bowl and fold in, but leave out a handful of each which will be used for the top.

5. Press the mixture into the tin filling in all of the corners.

6. Take the rest of your marshmallows and chocolate chips and place a few of them over the top, pressing them slightly into the mixture.

7. Bake in the oven for approximately 20- 25.

Tip – when you make individual cookies, they will look really soft when you take them out, this is not the case with the cookie bars as the have more inside to cook. They should be hard on the outside, and when you pop a skewer in the middle, it should come out clean (a crumb or 2 is fine) , if it doesn’t come out clean, you need to bake for longer.

8. When ready, remove from the oven. Leave on the side for a couple of minutes before placing them on a wire cooling rack.

9. Place on a cooling rack to cool before cutting into sizes that suit you.



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