Chocolate Mint Slice Bars

Name: Chocolate Mint Slice Bars
Prep time: 20 min
Cook time: 10 min
Total time: 30 min
Yield: 16 bars
Ingredients: 200g digestive biscuits, crushed; 100g unsalted butter, melted; 50g cocoa powder; 200g icing sugar; 50g unsalted butter, softened; 2 tablespoons peppermint extract; Green food coloring (optional); 200g dark chocolate, chopped; 1 tablespoon vegetable oil

Highlighted under: Classic Meals

I absolutely adore these Chocolate Mint Slice Bars! The rich chocolate paired with a refreshing mint filling creates a delightful balance that I can't resist. When I first made these bars, I was surprised at how simple the process was, yet the end result felt indulgent and luxurious. With only a few ingredients, you can whip up a batch that’s perfect for sharing or keeping all to yourself. Trust me, once you try them, you’ll want to make these bars a regular treat in your kitchen.

Created by

Xenia Radcliffe

Last updated on 2026-01-12T04:57:34.581Z

When I first set out to create these Chocolate Mint Slice Bars, I wanted to capture the essence of mint chocolate in every bite. After several trials, I discovered that using high-quality cocoa powder really made a difference in flavor. The deep chocolate taste beautifully complements the mint frosting, and the texture of the bars is both dense and satisfying.

Another little secret I learned is to let the bars sit in the fridge for a while after cutting them; it enhances the flavors and ensures a cleaner cut. The moment you bite into one, you'll find it hard to resist going back for another!

        Why You'll Love These Bars
        Rich chocolate flavor paired with refreshing mint
Creamy texture that melts in your mouth
Perfect for celebrations or as a sweet indulgence

      

The Importance of Ingredients

The choice of biscuits greatly influences the flavor and texture of your Chocolate Mint Slice Bars. Digestive biscuits provide a slightly sweet, buttery base with the perfect crumbly texture. If you're looking for a gluten-free option, crushed gluten-free cookies can work just as well. You may want to adjust the butter slightly, depending on the moisture content of the alternative biscuits you use.

In the mint filling, the quality of the peppermint extract is crucial. Not all extracts are created equal, and a high-quality extract can elevate the bar’s flavor significantly. If you prefer a lighter mint taste, you can reduce the amount of peppermint extract to suit your preference. Adding a few drops of green food coloring is optional—just make sure to mix well to achieve an even color throughout.

Perfecting the Topping

Melting the dark chocolate and vegetable oil requires careful attention to prevent burning. Using a double boiler is a great method, as it allows for gentle heating. Stir the mixture frequently until it becomes glossy and smooth. If you're using a microwave, heat the chocolate in short bursts of 20-30 seconds, stirring in between. This way, you can catch any inconsistencies before they lead to scorched chocolate.

For the chocolate topping, feel free to experiment with different types of chocolate. A mix of dark and milk chocolate can create a nice balance of richness and sweetness. Just keep in mind that this might alter the overall flavor profile slightly, so adjust the sweetness in the mint layer accordingly if you go for a sweeter chocolate.

Ingredients

For the Base

200g digestive biscuits, crushed
100g unsalted butter, melted
50g cocoa powder

For the Mint Filling

200g icing sugar
50g unsalted butter, softened
2 tablespoons peppermint extract
Green food coloring (optional)

For the Chocolate Topping

200g dark chocolate, chopped
1 tablespoon vegetable oil

Instructions

Prepare the Base

In a mixing bowl, combine the crushed digestive biscuits, melted butter, and cocoa powder. Mix until well combined. Press this mixture firmly into the bottom of a lined square baking dish. Place it in the fridge to set while you prepare the filling.

Make the Mint Filling

In another bowl, beat the softened butter with the icing sugar until smooth. Add the peppermint extract and a few drops of green food coloring if desired. Mix until the color is evenly distributed. Spread the mint filling over the chilled base and return it to the fridge.

Prepare the Chocolate Topping

Melt the dark chocolate and vegetable oil together in a heatproof bowl over simmering water or microwave in short bursts. Once melted, pour the chocolate over the mint layer, spreading it evenly. Refrigerate until set.

Slice and Serve

Once the chocolate topping is set, remove the bars from the dish and slice them into squares or rectangles. Serve immediately or store in an airtight container in the fridge.

Pro Tips

For extra flavor, consider adding crushed mint candies to the mint filling. This adds a delightful crunch and an even stronger mint punch!

Storing and Serving Tips

These Chocolate Mint Slice Bars can be made ahead of time, which makes them perfect for parties or meal prep. Once sliced, store them in an airtight container in the fridge where they will stay fresh for up to a week. You can also layer parchment paper between the bars to prevent them from sticking together.

If you want to freeze them, wrap each bar individually in plastic wrap and then place them in a freezer-safe container. They can last in the freezer for up to three months. To serve, simply thaw in the refrigerator overnight for a soft and creamy treat that tastes freshly made.

Variations to Try

Want to mix things up? Try adding a layer of crushed chocolate mint candies to the mint filling for an extra pop of texture and flavor. Alternatively, consider drizzling some white chocolate over the top for a beautiful presentation and a touch of contrast to the dark chocolate layer.

If you're a fan of nuts, chopped walnuts or pecans folded into the base mixture can add a delightful crunch. Just be sure to adjust the amount of butter slightly to accommodate for the added ingredients, ensuring the texture remains intact.

Questions About Recipes

→ Can I use milk chocolate instead of dark chocolate?

Yes, you can use milk chocolate for a sweeter topping, but it may alter the richness of the bars.

→ How long can I store these bars?

These bars can be stored in an airtight container in the fridge for up to a week.

→ Is it possible to make these gluten-free?

Absolutely! Just substitute the digestive biscuits with gluten-free biscuits.

→ Can I freeze the Chocolate Mint Slice Bars?

Yes, you can freeze them. Just ensure they are well wrapped and consumed within three months for the best taste.