It is time to fill up those baking tins! This easy recipe for chocolate weetbix slice will be a family favourite.
This Chocolate Weetbix Slice is a perfect treat. It’s ideal with a nice hot cup of coffee in the afternoon and also a hit with the little ones. This recipe incorporates the humble Weetbix, a breakfast favourite for many Kiwis and Aussies. Sometimes it is called Wheat Biscuits or in the UK Wheetabix.
All of the ingredients needed are pantry staples. It’s fairly quick to whip up, so it’s the perfect go-to treat! One Weetbix biscuit weighs 16g so this recipe is a great one to use up the crumbly bits at the bottom of the box. If you love Weetbix recipes as much as me, be sure to check out my whole collection of The Best Weetbix Recipes.

This recipe is my most popular by far, with over 2.8 million video views on Facebook, so it’s sure to be a winner in your household. If you want to follow along with the video, you can find it at the top of this post.
The Weetbix and coconut give the chocolate slice the perfect texture. It’s soft but with a little bit of crunch, this depends on how long you cook it for. If you want a bit more flavour and texture you could add in some chopped nuts.
Pair this with the smooth, rich, velvety chocolate icing and you’ve got yourself a tasty slice for a sweet snack or an after dinner treat!
How to make Weetbix Slice:
First of all, preheat the oven to 180°C fanbake. Then place the butter, sugar and cocoa in a large saucepan and melt them together over a low heat until combined.
Remove the pan from the heat and add the crushed Weetbix, flour, coconut and baking powder. Mix everything together well. Pour into a lined tray and press firmly. Bake for 15-20 minutes.
To make the icing, mix together the icing sugar, cocoa and butter. Add boiling water as needed to loosen the mixture and whisk out any lumps. Ice the slice while still warm. When the slice has cooled and the icing has set, slice into pieces.
Other recipe variations of Weetbix slice
If you want more recipes for Weetbix slice I have created two versions without cocoa in the base: Lemon Weetbix slice and Passionfruit Weetbix slice. They are both proving to be very popular with my readers giving me great feedback. My Weetbix chocolate chip cookies are super delicious too!
If you don’t have any Weetbix on hand you could try this similar recipe using cornflakes from my fellow food blogger friend Anna at Just a mum for Chocolate cornflake slice.
Common questions about Chocolate Weetbix Slice:
What size tin should I use? My slice tin is approximately 29 x 19cm. Anything close to this will work. The smaller your tin, the thicker your base will be and the longer it might take to cook.
Can I overcook this slice? Yes. If you overcook Chocolate Weetbix slice it can go quite hard. I recommend baking this for 14-20 minutes however, all ovens are different. If you know your oven ‘runs hot’ test it at the 15 minute mark. It should be soft when you bring it out of the oven and it will firm up as it cool down.
How long will this slice keep for? It will keep well for up to a week in an airtight container.
What other ingredients can be added? You can try adding dried apricots or cranberries to the base. Walnuts can be added on top of the icing.
Can Weetbix slice be frozen? Wrap well with cling wrap, baking paper or tin foil and freeze in an airtight container.
Can the coconut be taken out of this recipe? Yes just swap for 1 extra Weetbix biscuit and 1/2 a cup of flour.
How to make Weetbix slice Gluten Free? Use Gluten Free Weetbix and one cup of Gluten-Free flour or almond meal.

I hope your family loves this slice as much as mine does!
MORE EASY SLICE RECIPES FOR YOU TO TRY:
PASSIONFRUIT SLICE
No-bake Milk Chocolate Slice
GINGER CRUNCH
DARK CHOCOLATE PEPPERMINT SLICE
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Chocolate Weetbix Slice
A delicious baked slice with chocolate icing.
Ingredients
BASE
- 185g butter
- 1 cup sugar
- 2 Tbsp cocoa
- 3 Weetbix, crushed
- 1 cup plain flour
- 1 cup coconut
- 1 tsp baking powder
ICING
- 2 cups icing sugar
- 3 Tbsp cocoa
- 50g butter (softened)
- 2-3 Tbsp boiling water
Instructions
- Preheat oven to fanbake 180°C.
- In a large saucepan over low heat melt together butter, sugar and cocoa.
- Take off the heat then add Weetbix, flour, coconut and baking powder. Mix together.
- Pour into a lined tray and press down firmly. Bake for 15 to 20 mins until the slice is cooked but feels soft to the touch in the centre.
- Icing: Mix together icing sugar, cocoa and butter. Add boiling water as needed to loosen mixture and whisk out any lumps.
- Ice the slice while it is still warm then chop up once cooled and icing has set.
Notes
- You can sprinkle coconut over the top for added decoration and flavour.
Nutrition Information:
Yield: 28 Serving Size: 1Amount Per Serving: Calories: 158Total Fat: 8gSaturated Fat: 5gTrans Fat: 0gUnsaturated Fat: 2gCholesterol: 18mgSodium: 85mgCarbohydrates: 22gFiber: 1gSugar: 16gProtein: 1g
Nutritional values are approximate. Please use your own calculations if you require a special diet.
