This slice is quick to make, requires no oven, and has a fun chewy texture from the chocolate fish. It is simple enough for beginners and can be made ahead for gatherings or afternoon snacks.
Ingredients
(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)
Plain sweet biscuits, crushed
Cocoa powder
Desiccated coconut
Sweetened condensed milk
Butter, melted
Chocolate fish, chopped
Icing sugar
Extra cocoa powder
Hot water or milk
Extra butter for icing
Directions
Crush the biscuits into fine crumbs, leaving a few slightly larger pieces for texture.
Place the biscuit crumbs, cocoa powder, and coconut in a large mixing bowl.
Add the melted butter and condensed milk, then mix until everything is well combined.
Fold through the chopped chocolate fish.
Press the mixture firmly into a lined slice tin, smoothing the top with the back of a spoon.
Make the chocolate icing by mixing icing sugar, cocoa powder, softened butter, and a little hot water or milk until smooth.
Spread the icing over the slice.
Refrigerate until firm, then cut into squares or bars.
Add mini marshmallows for a rocky road-style version.
Use dark cocoa for a richer chocolate flavor.
Mix in chopped nuts for crunch.
Drizzle melted chocolate over the top instead of using icing.
Use gluten-free biscuits to make a gluten-free version.
Storage/Reheating
Store Chocolate Fish Slice in an airtight container in the refrigerator for up to 1 week.
It can also be frozen for up to 2 months. Thaw in the refrigerator before serving.
This slice does not need reheating and is best served chilled.
FAQs
Can I make Chocolate Fish Slice ahead of time?
Yes, it is a great make-ahead recipe because it needs time to chill and firm up.
Do I need to bake this slice?
No, this is a no-bake slice.
What are chocolate fish?
Chocolate fish are fish-shaped marshmallow sweets covered in chocolate.
Can I use regular marshmallows instead?
Yes, chopped marshmallows can be used, though the texture and flavor will be slightly different.
Can I freeze Chocolate Fish Slice?
Yes, freeze it in an airtight container for up to 2 months.
How do I stop the slice from crumbling?
Press the mixture firmly into the tin and chill it until fully set before cutting.
Can I use dark chocolate icing?
Yes, add extra cocoa powder or use melted dark chocolate for a deeper flavor.
What size tin should I use?
A standard square slice tin works well, especially around 8 inches square.
Can I make this without coconut?
Yes, replace the coconut with extra biscuit crumbs.
How should I cut clean slices?
Use a sharp knife and wipe it clean between cuts.
Conclusion
Chocolate Fish Slice is an easy, nostalgic treat with a chewy, chocolatey bite and a fun marshmallow twist. It is perfect for sharing, simple to prepare, and a great no-bake recipe to keep on hand.
A quick and easy Chocolate Fish Slice recipe made with crushed biscuits, cocoa, coconut, and chewy chocolate fish. This no-bake slice is rich, chocolatey, and perfect for parties, lunchboxes, or an indulgent homemade treat.
Author:Catherine
Prep Time:15 minutes
Cook Time:0 minutes
Total Time:2 hours 15 minutes
Yield:16 slices
Category:Dessert
Method:No-Bake
Cuisine:Australian / New Zealand
Diet:Vegetarian
Ingredients
250g plain sweet biscuits, crushed
2 tbsp cocoa powder
1 cup desiccated coconut
1 can (395g) sweetened condensed milk
125g butter, melted
12–15 chocolate fish, chopped
1 ½ cups icing sugar
2 tbsp cocoa powder (extra, for icing)
2–3 tbsp hot water or milk
30g butter, softened (for icing)
Instructions
Crush the biscuits into fine crumbs, leaving some slightly chunky pieces for texture.
In a large bowl, combine biscuit crumbs, cocoa powder, and coconut.
Add melted butter and condensed milk, mixing until fully combined.
Fold in the chopped chocolate fish.
Press the mixture firmly into a lined square slice tin. Smooth the surface evenly.
In a separate bowl, mix icing sugar, extra cocoa powder, softened butter, and hot water or milk until smooth.
Spread the icing evenly over the slice.
Refrigerate for at least 2 hours or until firm.
Cut into squares or bars and serve chilled.
Notes
Press mixture firmly to prevent crumbling.Chill thoroughly before slicing for clean cuts.Adjust icing consistency with small amounts of liquid if needed.Use a hot knife (wiped clean) for neat slices.
