5-Ingredient Hedgehog Slice Recipe: Quick No-Bake Chocolate Treat

Need an irresistible treat for a party, picnic, or an emergency chocolate craving? This hedgehog slice is the answer. A classic Australian no-bake slice, it uses just five main ingredients — sweetened condensed milk, butter, chocolate, crushed biscuits, and desiccated coconut — and comes together in about 20 minutes. The result is fudgy, gooey and biscuit-studded with a pleasant crunch, and it’s ridiculously easy to make.

What’s hedgehog slice?

Hedgehog slice is one of Australia’s most beloved sweet treats, similar to a chocolate fridge cake or the UK’s tiffin. Odd name aside — hedgehogs aren’t native to Australia — the slice is a cute moniker for a wildly popular chocolatey bar.

What does it taste like? Think of a soft, fudgy, no-bake brownie with biscuit pieces and a touch of crunch. It’s rich and chocolatey with a slightly chewy texture thanks to the condensed milk and butter.

Why try hedgehog slice?

• No-bake, almost one-bowl recipe. Ideal when you don’t want to use the oven but need something chocolaty and quick.
• Only five simple main ingredients. Mix-ins are optional, so it’s quick and low-fuss.
• Make ahead and store in the fridge. Great for parties, picnics and events.
• Customizable. Add nuts, dried fruit, cereal, fudge, caramel or other mix-ins to suit your taste.

What’s in it?

Biscuits: For readers outside Australia: “biscuits” here means cookies. I prefer a mix of plain biscuits (like Marie/Arrowroot or Rich Tea/Graham crackers) with Digestives for added texture. You can pulse them in a food processor or bash them in a sealed bag with a rolling pin. Leaving some larger chunks gives more crunch.

Chocolate: Use a 200g (7oz) bar in the slice mixture and another 200g for the topping. Dark chocolate in the base and milk chocolate on top is a lovely combination, but use whatever you prefer — white or flavored chocolate work too.

Sweetened condensed milk: The binding and “magic” ingredient. Use full-fat sweetened condensed milk for the best fudgy texture.

Butter: Adds richness and flavor. Salted butter works well, but use any good-quality butter.

Coconut: Desiccated coconut is traditional and adds texture and flavor. If someone dislikes coconut, replace it with cereal like Rice Krispies or extra crushed biscuits.

Optional mix-ins: Salted peanuts, other nuts, dried fruit, Rice Krispies, chopped fudge or caramel all work wonderfully — add about ⅓ to ½ cup, or adjust to taste.

How to make it

The step-by-step instructions below will guide you through the recipe. Scroll to the recipe card for exact quantities.

Prep: Crush the biscuits, leaving some larger pieces if you like. Line and lightly grease an 8-inch (20cm) square pan with baking paper.

Step 1: In a large heatproof bowl combine broken chocolate, butter and the sweetened condensed milk. Microwave in 30-second bursts for 1½–2 minutes, stirring halfway, until melted and smooth. Alternatively, melt gently over a bain-marie.

Step 2: Add the crushed biscuits, desiccated coconut and any optional mix-ins (peanuts, chopped fudge, dried fruit, cereal). Stir quickly and thoroughly while the chocolate mixture is still warm, ensuring everything is coated.

Step 3: Press the mixture evenly into the prepared tin, smoothing the top with the back of a wet metal spoon to prevent sticking. Chill in the fridge or freezer briefly while you melt the topping chocolate.

Step 4: Melt the second bar of chocolate in 30-second bursts in the microwave (about 1½ minutes), stirring until smooth. Pour and spread it over the set base.

Step 5: Cover the pan and refrigerate until the chocolate topping is firm and the slice is set — at least an hour, preferably a few hours for a chewier texture. Cut into 16 squares (or smaller pieces) to serve. Store chilled in an airtight container.

Ways to vary it

The classic hedge‑hog slice base is five ingredients, but you can adapt it easily. Try these variations:

• Replace peanuts with cereal like Rice Krispies, Cheerios or Cornflakes (note: cereal may soften after a few days).
• Use different nuts — almonds, hazelnuts or pistachios work well — or omit nuts entirely for a nut-free version.
• Add dried fruit such as sultanas, cranberries or chopped apricots (⅓–½ cup).
• Stir in a quarter cup of peanut butter into the melted chocolate for a nutty twist, or add a couple teaspoons of instant coffee for an espresso note.
• Top with flavored chocolate (mint, orange or caramel) or swirl different chocolates together before setting.
• Sprinkle M&Ms, sprinkles, crushed nuts or extra coconut onto the topping before it sets for a festive finish.

This hedgehog recipe is forgiving — the amounts don’t need to be exact. Mix and match ingredients to create a version you love.

Give it as a gift

Hedgehog slice makes a lovely homemade gift. Cut into small squares and package in a gift bag or box, or place a few pieces in a clear cellophane bag and tie with ribbon. It resembles soft fudge studded with goodies, so it’s a treat many people appreciate.

More things to know (FAQs)

More easy chocolate slice recipes

• No-bake caramel slice — another simple 5-ingredient condensed milk slice.
• Strawberry brownies — fudgy bars ready in 30 minutes.
• Biscoff white chocolate blondies — made with Biscoff spread and white chocolate.
• Peanut butter cornflake or Cheerio bars — easy no-bake treats with big flavor.
• 7 layer bars (magic bars) — another condensed milk favourite.
• White chocolate tiffin (fridge cake) — a fruity, no-bake twist on a chocolate slice.