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My Homemade Chocolate Crunch
Take a trip down memory lane with this classic chocolate concrete cake! If you remember this from school, then you’re in for a real treat. If you’re new to this old school delicacy, then get ready for your mind to be blown…

This chocolate concrete dessert is an iconic school day recipe and I’m so surprised that I haven’t made it sooner! It’s equally rich, indulgent, delicious and the flavours are exactly how I remember it.
It’s a great dessert to make when you want something that’s quick, tasty and also inexpensive. Despite it being so easy to make, the flavours are absolutely delicious, and trust me, it’s so hard to stop at one.
If you’re looking for a sweet treat that will take you right back to your school days, then guess what, you’ve come to the right place. Here’s a warning before you proceed… YOU WILL be making this all the time (I can’t seem to get enough of it)!


Why You’ll Love This Recipe
I am a huge fan of desserts that I can make easily and bake in a matter of minutes. Luckily for us, this chocolate concrete recipe does both, and that’s not all, you only need four basic ingredients to make it.
I love to eat it freshly baked because it’s warm and the texture is soft. Served like this, the taste and texture remind me of brownies.
When it cools down, the texture turns quite crunchy, and I find it tastes like chocolate shortbread. That’s why it’s also called chocolate brick, choc crunch and concrete cake.
Recipe Ingredients
Below are the few ingredients I used to make this recipe:
- Plain Flour: Use plain flour (don’t use self-raising flour).
- Granulated Sugar: Not only is granulated sugar added to the concrete cake mixture, but a classic and traditional recipe has granulated sugar sprinkled on top too! The sugar topping provides a crunchy sweetness which is followed by a chocolate cocoa taste.
- Egg: Adding an egg helps the ingredients bind together (I used a medium egg).
- Margarine (Butter): I used stork margarine, but you could also use butter. Whichever you use, it needs to be melted.
- Cocoa Powder: The main flavour in this recipe which provides a delicious chocolatey flavour.
How To Make Chocolate Concrete (Crunch)
Here’s a summary of how I make this retro chocolate concrete. You can get the full recipe instructions on the recipe card below:
Step One:

I start by mixing together plain flour, sugar and cocoa powder in a large mixing bowl.
Step Two:

I put margarine in a microwave-safe bowl and microwave it until it has melted. Then I add the melted margarine to the mixing bowl with one egg and mix everything together.
Step Three:
