Name: Christmas Peppermint Slice Recipe
Prep time: 20 min
Cook time: 5 min
Total time: 4 h 25 min
Cuisine: Western
Ingredients: 250g butter; ¼ cup cocoa; 1 cup brown sugar; 1 teaspoon vanilla extract; ½ cup milk; 2 packets (250g each) Marie or wine biscuits, crushed (not too finely); 190g white chocolate; 1 Tbsp vegetable oil; 1 tsp peppermint essence; 100g Christmas M&Ms; 4 candy canes, crushed

Jump to Recipe· 4.7 from 55 reviews

If you’re on the hunt for a festive treat that’s as fun to make as it is to eat, I’ve got just the thing for you: a Christmas Peppermint Slice Recipe that’s guaranteed to become a holiday favorite. This slice wraps up all those classic Christmas flavors — rich chocolate, refreshing peppermint, and a colorful crunch — into one irresistible traybake. Trust me, from the moment I first tried this, I was hooked, and every Christmas since, it disappears faster than I can say “Merry Christmas!” So grab your apron, and let’s dive into making this festive delight together.

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Why You’ll Love This Recipe

Simple Ingredients: You probably have most of this already in your pantry and fridge, making it super convenient.
No Bake, No Fuss: This recipe is quick to throw together with minimal cooking, perfect when you’re busy with holiday prep.
Festive Flavors: The peppermint and chocolate combo feels wonderfully seasonal and refreshing without being overpowering.
Crowd Pleaser: Every Christmas, my family goes crazy for this — usually requesting it before the decorations even go up!

Christmas Peppermint Slice Recipe - Recipe Step

Ingredients You’ll Need

Each ingredient plays a role in building the perfect Christmas peppermint slice. From the buttery cocoa base to the minty white chocolate topping, these flavors and textures come together effortlessly. Here are a few shopping tips to keep in mind as you gather your ingredients.

Christmas Peppermint Slice Recipe - Ingredients

Butter: I always use unsalted butter so I can control the salt levels myself, and it helps the slice set beautifully.
Cocoa: Look for good-quality cocoa powder for a richer chocolate flavor — it really makes a difference.
Brown Sugar: Gives that lovely caramel undertone that pairs perfectly with chocolate and peppermint.
Vanilla Extract: Adds a subtle warmth that rounds out the flavors.
Milk: Use whole milk if you can — it helps to make the texture just right.
Marie or Wine Biscuits: These create the crunch and body; crush them coarsely to keep some texture.
White Chocolate: The key to that minty topping — go for good melting chocolate to avoid graininess.
Vegetable Oil: Just a tablespoon smooths out the white chocolate and helps the peppermint essence blend evenly.
Peppermint Essence: This is where the magic happens — a little goes a long way for that festive kick.
Christmas M&Ms: Pure fun! They add color and a sweet crunch on top.
Candy Canes: Crush these yourself for a fresh peppermint burst and a visually festive touch.

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Note: You’ll find the complete list of ingredients, along with their exact measurements, in the printable recipe card at the bottom of this post.

Variations

Over the years, I’ve found so many ways to make this Christmas Peppermint Slice Recipe totally your own. Feel free to experiment — I promise it’s forgiving and fun!

Chocolate Lovers’ Twist: Swap out the white chocolate topping for dark chocolate and add a sprinkle of crushed peppermint for a more intense cocoa flavor — my husband adores this version!
Dairy-Free Version: Use a plant-based butter and dairy-free milk; coconut milk works wonderfully for the base, plus vegan white chocolate alternatives are widely available.
Extra Crunch: Add chopped nuts like pistachios or almonds to the biscuit mix for an added texture boost and nutty flavor.
Festive Extras: Try mixing in dried cranberries or freeze-dried raspberries on top for a tart contrast and pretty presentation.

How to Make Christmas Peppermint Slice Recipe

Step 1: Prep Your Pan and Ingredients

Start by lining a 19 x 29 cm slice tin with baking paper — this makes removing the slice a breeze without it sticking or breaking apart. While you’re at it, crush your Marie biscuits coarsely; I like leaving some bigger pieces in there for extra texture. Also, crush the candy canes roughly: too fine and they’ll sink into the topping, but a bit chunkier gives a lovely festive crunch.

Step 2: Make the Chocolate Biscuit Base

Melt your butter, cocoa, and brown sugar together gently in a saucepan over low heat. Stir constantly so the sugar dissolves completely—this step takes just a few minutes. Then, remove from heat and whisk in the vanilla and milk until everything’s smooth and glossy. Pour this delicious chocolate mixture over the crushed biscuits in a big bowl, and toss thoroughly to coat every crumb. When well mixed, press the mixture firmly and evenly into your lined tin — use the back of a metal spoon to smooth it out. Firm pressure here helps the slice hold together when cutting, so don’t be shy!

Step 3: Whip Up the Peppermint White Chocolate Topping

Pop the white chocolate, vegetable oil, and peppermint essence into a microwave-safe bowl. Heat in 30-second bursts, stirring between each, until the chocolate is just about melted. Then, stir off the heat until it’s fully smooth — the residual warmth will take care of the last bits. Pour this over your chocolate biscuit base and spread it out evenly. Before the topping sets, quickly sprinkle over the crushed candy canes and Christmas M&Ms. It’s like the cherry on top of a very festive sundae!

Step 4: Chill and Cut

Pop the whole slice in the fridge for at least 4 hours — or overnight, if you can wait that long — until it’s fully set and firm. Here’s something I learned the hard way: take the slice out of the fridge 20 minutes before cutting. This little window softens the topping just enough, so your knife glides through without cracking the white chocolate or squashing the base. Use a sharp knife and wipe it clean after each cut for neat edges.

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Pro Tips for Making Christmas Peppermint Slice Recipe

Keep It Coarse: Don’t crush your biscuits too finely; it preserves a lovely crunch and keeps the slice from becoming dense.
Watch the Microwave: When melting the white chocolate, patience is key — overheating causes graininess, so heat in short bursts and stir often.
Use Quality Peppermint Essence: The flavor really stands out here; a good-quality essence will give that fresh, holiday brightness you want.
Timing the Chill: Chill long enough for a firm set, but remember to bring it to just below fridge temp before slicing for clean cuts.

How to Serve Christmas Peppermint Slice Recipe

Christmas Peppermint Slice Recipe - Serving

Garnishes

I love adding a few extra crushed candy canes or festive sprinkles right before serving for that extra holiday sparkle. Sometimes, I toss a few mini candy canes or whole Christmas M&Ms alongside the slices on the serving plate—it looks so inviting, and everyone always grabs an extra piece just for the topper!

Side Dishes

This peppermint slice pairs beautifully with a warm cup of spiced tea or peppermint hot chocolate—trust me, it’s my go-to festive combo. You could also serve it alongside other Christmas treats like gingerbread cookies or fruit mince pies for a full holiday spread.

Creative Ways to Present

For Christmas parties, I arrange these slices on a pretty platter layered with fresh holly leaves and edible flowers for an elegant touch. I’ve even wrapped individual slices in cellophane tied with festive ribbon—it makes for darling edible gifts that friends and neighbors love.

Make Ahead and Storage

Storing Leftovers

Leftovers? If you have any (which is unlikely), store your Christmas peppermint slice in an airtight container in the fridge. It stays fresh and delicious for up to a week. I always line the container with some parchment paper to keep the pieces from sticking, which helps maintain their perfect texture.

Freezing

You can freeze this slice with great success. I usually cut it into portions, wrap each piece tightly in plastic wrap, then pop them in a freezer-safe bag. When you want some, just thaw in the fridge overnight — it tastes just as good as freshly made, which is a real lifesaver during busy holiday weeks.

Reheating

Since this is a no-bake slice, reheating isn’t necessary. But if you prefer a softer texture, leaving the slice at room temperature for 30 minutes before serving works wonders. I sometimes find this makes the peppermint flavor come through even more.

FAQs

Can I use other types of biscuits instead of Marie or wine biscuits?

Absolutely! Digestive biscuits or plain tea biscuits work well too — just aim for a light, crunchy biscuit that will absorb the chocolate mixture without becoming soggy. Avoid overly sweet or spiced biscuits that might clash with the peppermint flavor.
Is peppermint essence the same as peppermint extract?

They’re similar but not identical. Peppermint essence is slightly sweeter and less concentrated than peppermint extract. If using extract, use a little less to avoid overpowering the white chocolate topping — start with half the amount and adjust to taste.
Can I make this slice nut-free?

Yes, this Christmas Peppermint Slice Recipe is naturally nut-free! Just check your M&Ms and chocolates for any potential cross-contamination if allergies are a concern.
How do I prevent the white chocolate topping from cracking?

Melting the white chocolate slowly and stirring well ensures a smooth, glossy topping. Also, avoid cutting it straight from the fridge — letting the slice sit at room temp for 20 minutes will soften the topping and make slicing cleaner.

Final Thoughts

This Christmas Peppermint Slice Recipe has been my go-to festive treat for years, and what I absolutely love is how easy it is to make yet so impressively delicious. It’s like having all the best parts of Christmas wrapped up in every bite — chocolate richness, minty freshness, and a bit of playful color and crunch. I hope you give it a try this holiday season and find yourself, like me, reaching for that extra slice when no one’s looking. Happy baking and Merry Christmas!