Chocolate Mint Slice Bars

Name: Chocolate Mint Slice Bars
Prep time: 20 min
Cook time: 30 min
Total time: 50 min
Yield: 16 bars
Ingredients: 1 cup digestive biscuits, crushed; 1/2 cup unsweetened cocoa powder; 1/2 cup unsalted butter, melted; 1 cup powdered sugar; 1 teaspoon vanilla extract; 1/2 cup unsalted butter, softened; 2 cups powdered sugar; 2 tablespoons milk; 1 teaspoon peppermint extract; Green food coloring (optional); 200g dark chocolate, chopped; 2 tablespoons coconut oil

Highlighted under: Baking & Desserts

I can't get enough of these Chocolate Mint Slice Bars! The combination of rich chocolate and refreshing mint makes each bite a little piece of heaven. I love making these for special occasions, but they're also perfect for a sweet snack during the week. The best part is how simple the recipe is, requiring minimal ingredients and effort. Whether served at a party or enjoyed alone, these bars always seem to bring a smile to my face. Trust me, once you try them, you’ll understand why they’re a family favorite.

Created by

Erin Wallace

Last updated on 2026-01-06T00:55:14.983Z

When I first decided to make Chocolate Mint Slice Bars, I didn't expect them to become such a holiday staple in my house. I experimented with different mint levels and found that a subtle hint works best, allowing the rich chocolate to shine through without being overpowered. I used a mix of dark and semi-sweet chocolate to achieve the perfect balance between bitterness and sweetness.

One of the best tips I discovered is to let the bars set for a few hours in the fridge. This not only firms them up nicely but also allows the flavors to meld. Each time I take a bite, I experience that delightful crunch followed by a creamy minty finish that is simply irresistible!

        Why You'll Love These Bars
        Intense chocolate flavor complemented by refreshing mint
Creamy texture that satisfies every sweet tooth
Easily customizable for holidays or personal preferences
Quick to prepare and perfect for sharing

      

Understanding the Base

The base of these Chocolate Mint Slice Bars is crucial for achieving a balanced texture. The digestive biscuits provide a delightful crunch, while the cocoa powder enhances the chocolate flavor, creating a rich foundation. Make sure to crush the biscuits finely, as larger pieces can result in a gritty texture. Press the mixture firmly into the baking dish; this ensures it holds together well when sliced. Refrigerating it for 15 minutes helps set the base so it can support the subsequent layers.

Using unsalted butter allows you to control the saltiness of the bars, ensuring that the sweet chocolate and mint flavors shine through without being overpowered. If you're looking for a healthier alternative, consider substituting the butter with coconut oil. This can offer a subtle coconut flavor and is a great option for those following a dairy-free diet.

Creating the Mint Layer

The mint layer is where the bars come alive with refreshing flavor. Be sure to use softened butter for easy mixing and a smooth consistency. Mixing the powdered sugar gradually into the butter ensures there are no lumps; whisk until the mixture is airy and light. Adding milk helps to achieve the right spreadable consistency. If you prefer a more intense mint flavor, you can increase the peppermint extract slightly, but do so cautiously, as it can be quite strong.

For that vibrant green color, use food coloring sparingly. A few drops can make a significant difference without overwhelming the natural hues of the ingredients. If you’re inclined towards a festive touch, consider incorporating crushed peppermint candies or a sprinkle of cocoa powder on top of the mint layer before adding the chocolate topping.

Tips for the Chocolate Topping

Melt the dark chocolate and coconut oil together for the topping, as the coconut oil helps to thin the chocolate, making it easier to pour and spread. Ensure you melt the chocolate gently, either in a microwave in 20-second intervals or using a double boiler. Be attentive while stirring, as overheating can cause the chocolate to seize, resulting in a lumpy texture. Look for a glossy, smooth finish when it’s ready.

Allowing the chocolate layer to set in the refrigerator for at least 30 minutes is essential for achieving clean cuts when slicing the bars. If you prefer a thicker layer of chocolate, you can increase the amount to 300g, adjusting the coconut oil accordingly to maintain the right consistency. For a fun twist, consider adding a sprinkle of sea salt on top of the chocolate layer for a combination of sweet and salty flavors.

Ingredients

Gather the following ingredients for your Chocolate Mint Slice Bars:

Base:

1 cup digestive biscuits, crushed
1/2 cup unsweetened cocoa powder
1/2 cup unsalted butter, melted
1 cup powdered sugar
1 teaspoon vanilla extract

Mint Layer:

1/2 cup unsalted butter, softened
2 cups powdered sugar
2 tablespoons milk
1 teaspoon peppermint extract
Green food coloring (optional)

Chocolate Topping:

200g dark chocolate, chopped
2 tablespoons coconut oil

Make sure all ingredients are at room temperature for best results.

Instructions

Follow these simple steps to create your delicious Chocolate Mint Slice Bars:

Prepare the Base

In a mixing bowl, combine the crushed digestive biscuits, cocoa powder, melted butter, powdered sugar, and vanilla extract. Mix well until all ingredients are combined. Press the mixture firmly into the bottom of a lined baking dish and refrigerate for about 15 minutes.

Make the Mint Layer

In another bowl, beat the softened butter, powdered sugar, milk, peppermint extract, and food coloring until smooth. Spread the mint mixture over the chocolate base evenly and return to the fridge for another 15 minutes.

Prepare the Chocolate Topping

Melt the chopped dark chocolate and coconut oil together in a microwave or double boiler, stirring until smooth. Pour the melted chocolate over the mint layer, spreading it evenly, then refrigerate for at least 30 minutes until set.

Slice and Serve

Once set, lift the bars out of the baking dish and cut into squares. Serve chilled or at room temperature and enjoy your homemade Chocolate Mint Slice Bars!

Enjoy these bars with a glass of milk or as a delightful treat with your favorite coffee!

Pro Tips

For extra texture, consider adding crushed mint candies on top before chilling. Also, if you prefer a stronger mint flavor, adjust the peppermint extract to your liking.

Storage and Make-Ahead Tips

These Chocolate Mint Slice Bars can be prepared a few days in advance, making them an excellent option for gatherings or unexpected guests. After slicing, store the bars in an airtight container in the refrigerator for up to one week. They can also be frozen for up to three months. To freeze, ensure they are wrapped tightly in plastic wrap and then placed in a freezer-safe container. Thaw in the refrigerator before serving; they taste just as delicious even after freezing!

If you find the bars a bit too firm after refrigerating, simply allow them to sit at room temperature for about 10-15 minutes before serving. This will soften the chocolate slightly and enhance the overall texture, making each bite more enjoyable. Just be cautious with the thawing time, as you don’t want the mint layer to become too soft.

Troubleshooting Common Issues

If your bars don’t set properly, it could be due to an insufficient refrigeration time. Ensure that each layer has set adequately before adding the next. If they are still too soft after refrigerating, consider placing them in the freezer for a short while, but watch them closely to prevent them from becoming overly hard.

In terms of flavor, if you find the mint layer too sweet after mixing, you can balance it out by adding a pinch of salt or a teaspoon of lemon juice. This can elevate the overall flavor profile and help to cut through the sweetness. On the other hand, should you prefer a less intense chocolate flavor, you can substitute half of the dark chocolate with milk chocolate for a creamier taste.

Questions About Recipes

→ Can I use a different type of chocolate?

Yes, feel free to use milk chocolate or a combination of chocolates based on your taste preferences.

→ How long do these bars last?

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

→ Can I make these bars gluten-free?

Certainly! Just use gluten-free biscuits as a substitute for the digestive biscuits.

→ What can I substitute for peppermint extract?

You can use vanilla extract for a milder flavor or try another mint extract if you prefer.