Choc Mint Cake Bars

by | Oct 5, 2017

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A chocolate cake topped with peppermint icing and dark chocolate.

I’ve been baking up a storm recently for friends and family. My kitchen was over-run with 60 decorated unicorn cookies prepared for my Niece’s First Birthday. They were such a blast to make, and the recipe, decorating instructions and video are coming soon.

Then I tackled a two-tiered pink and gold bridal shower cake. I think I developed a few extra grey hairs in the process! I’m definitely more of a baker than a decorator. 

So when looking for baking inspiration for The Cake Mistress I wanted something simple. In an old 1970s cookbook, I spotted a recipe for “Peppermint Slice”. Browsing the recipe, I realised it would turn out more like a soft iced sheet cake than a firmer “slice” as we know them. Which is okay by me. As long as it’s sweet and edible, I’m on board.

My adapted Choc Mint Cake Bar recipe is easy to make. First, you bake a regular chocolate cake in a sheet pan, slice tin or “Lamington” tin (for the Aussies), and top it with a shiny mint glace icing. Once that’s set, you pour a layer of melted chocolate on top and leave it to set. Et voila! A delicious chocolate mint cake to serve.

HOW TO MAKE CHOC MINT CAKE BARS


Click to watch how to make Choc Mint Cake Bars

CHOC MINT CAKE BARS

Makes: 16 at least      Difficulty: Easy

EQUIPMENT:

20 x 30 cm deep baking tray

 

INGREDIENTS:

Chocolate Cake

165g Self Raising Flour

180g Caster Sugar

½ teaspoon Bicarbonate Soda

40g Cocoa Powder

70g Unsalted Butter, softened to room temperature

125ml Water

½ teaspoon Vanilla Extract

2 Eggs, lightly beaten

Peppermint Icing

1 teaspoon Vegetable Oil

300g Icing Sugar

¼ teaspoon Peppermint Essence

Green food colouring

3-4 tablespoons Milk

Chocolate Topping

200g Dark Chocolate, finely chopped

METHOD:

Preheat the oven to 180 degrees Celsius (160 fan-forced; 350F). Line the base of the baking tray with baking paper and grease the sides with non-stick spray.

Add the flour, sugar, butter, bicarbonate soda, cocoa powder, water and vanilla to a large mixing bowl. Use a hand-mixer to cream the batter together until thick and creamy. Add the eggs and whisk with the mixer for two minutes.

Scrape the batter into the prepared cake tin. Place on the middle rack of the oven and bake for 25-30 minutes. The cake is ready when the top springs back when lightly touched and a skewer into the middle comes out clean.

Remove cake from the oven and allow it to cool completely.

When the cake is cool, prepare the peppermint icing. Add the oil, icing sugar, peppermint essence, 3 drops of green food colouring and milk to a bowl. Stir together vigorously over a bowl of hot water until glossy.

Pour the mint icing evenly over the cake. Quickly spread the icing to the edges but don’t move it around too much or it becomes grainy. Let the icing set.

When the icing has set, melt the chocolate and spread it evenly over the top of the mint icing. Allow the chocolate to set hard.

To serve, cut the cake into bars. Use a hot knife to help cut cleanly through the chocolate.

BAKING TIPS:

  • Make sure the peppermint icing has set completely before adding warm melted chocolate on top
  • To cut the bars cleanly, use the “hot knife” method. Fill a bowl with hot water. Leave your cutting knife in the hot water for 10 seconds, wipe the blade dry, then cut through the set chocolate layer. As the knife cools re-soak it in hot water.

 

Choc Mint Cake Bars
Choc Mint Cake Bars
A chocolate sheet cake topped with peppermint icing and dark chocolate.
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Print Recipe
Servings Prep Time Cook Time Passive Time
16cake bars at least 2hrs 30mins 1hr
Servings Prep Time
16cake bars at least 2hrs
Cook Time Passive Time
30mins 1hr
Ingredients
  • Chocolate Cake
  • 165 g Self Raising Flour
  • 180 g Caster Sugar
  • 1/2 teaspoon Bicarbonate Soda
  • 40 g Cocoa Powder
  • 70 g Unsalted Butter softened to room temperature
  • 125 ml Water
  • 1/2 teaspoon Vanilla Extract
  • 2 Eggs lightly beaten
  • Peppermint Icing
  • 1 teaspoon Vegetable Oil
  • 300 g Icing Sugar
  • 1/4 teaspoon Peppermint Essence
  • 3-4 tablespoons Milk
  • Green food colouring
  • Chocolate Topping
  • 200 g Dark Chocolate finely chopped
Servings: cake bars at least
Units:
Ingredients
  • Chocolate Cake
  • 165 g Self Raising Flour
  • 180 g Caster Sugar
  • 1/2 teaspoon Bicarbonate Soda
  • 40 g Cocoa Powder
  • 70 g Unsalted Butter softened to room temperature
  • 125 ml Water
  • 1/2 teaspoon Vanilla Extract
  • 2 Eggs lightly beaten
  • Peppermint Icing
  • 1 teaspoon Vegetable Oil
  • 300 g Icing Sugar
  • 1/4 teaspoon Peppermint Essence
  • 3-4 tablespoons Milk
  • Green food colouring
  • Chocolate Topping
  • 200 g Dark Chocolate finely chopped
Servings: cake bars at least
Units:
Instructions
  1. Preheat the oven to 180 degrees Celsius (160 fan-forced; 350F). Line the base of the baking tray with baking paper and grease the sides with non-stick spray.
  2. Add the flour, sugar, butter, bicarbonate soda, cocoa powder, water and vanilla to a large mixing bowl. Use a hand-mixer to cream the batter together until thick and creamy. Add the eggs and whisk with the mixer for two minutes.
  3. Scrape the batter into the prepared cake tin. Place on the middle rack of the oven and bake for 25-30 minutes. The cake is ready when the top springs back when lightly touched and a skewer into the middle comes out clean.
  4. Remove cake from the oven and allow it to cool completely.
  5. When the cake is cool, prepare the peppermint icing. Add the oil, icing sugar, peppermint essence, 3 drops of green food colouring and milk to a bowl. Stir together vigorously over a bowl of hot water until glossy.
  6. Pour the mint icing evenly over the cake. Quickly spread the icing to the edges but don’t move it around too much or it becomes grainy. Let the icing set.
  7. When the icing has set, melt the chocolate and spread it evenly over the top of the mint icing. Allow the chocolate to set hard.
  8. To serve, cut the cake into bars. Use a hot knife to help cut cleanly through the chocolate.
Recipe Notes
  • Make sure the peppermint icing has set completely before adding warm melted chocolate on top
  • To cut the bars cleanly, use the "hot knife" method. Fill a bowl with hot water. Leave your cutting knife in the hot water for 10 seconds, wipe the blade dry, then cut through the set chocolate layer. As the knife cools re-soak it in hot water.
Nutrition Facts
Choc Mint Cake Bars
Amount Per Serving
Calories 268 Calories from Fat 81
% Daily Value*
Total Fat 9g 14%
Saturated Fat 5g 25%
Polyunsaturated Fat 0.4g
Monounsaturated Fat 2g
Cholesterol 36mg 12%
Sodium 55mg 2%
Potassium 99mg 3%
Total Carbohydrates 47g 16%
Dietary Fiber 2g 8%
Sugars 36g
Protein 3g 6%
Vitamin A 3%
Calcium 1%
Iron 7%
* Percent Daily Values are based on a 2000 calorie diet.

You might like to explore our other cake recipes, like Chocolate Fudge Cake, Mocha Fudge Cake Bars, and Easy Chocolate Cake. Chocoholics, we have a whole section on baking recipes with chocolate too.

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