Hazelnut Chocolate Slice | via

Let's Bake

Chocolate Hazelnut Slice

Yield Serves 12 1x
Prep: 50 minutesCook: 40 minutesTotal: 1 hour 30 minutes

Delicious Chocolate Hazelnut Slice filled with roasted hazelnuts and chocolate chips, topped with chocolate ganache and chocolate hazelnut cookie crumbs.


Chocolate slice

  • 115 grams (1/2 cup or 1 stick) unsalted butter, room temperature
  • 100 grams (1/2 cup) caster sugar
  • 90 grams (1/2 cup) brown sugar
  • 1 teaspoon vanilla extract
  • 1 large egg, room temperature
  • 105 grams (3/4 cup) plain flour
  • 1 teaspoon baking powder
  • 20 grams (1/4 cup) cocoa powder
  • 20 grams (1/4 cup) skinless roasted hazelnuts, chopped
  • 75 grams (1/2 cup) chocolate chips

Hazelnut crumbs

  • 40 grams (1/2 cup) skinless roasted hazelnuts
  • 70 grams (1/2 cup) plain flour
  • 50 grams (1/4 cup) caster sugar
  • 1 tablespoon cornflour or corn starch
  • 1 tablespoon cocoa powder
  • 60 grams (1/4 cup) unsalted butter

Chocolate ganache

  • 100 grams (2/3 cup) good quality dark chocolate
  • 120 ml (1/2 cup) thickened cream


  1. Preheat oven to 180 C (350 F) standard / 160 C (320 F) fan-forced. Grease and line an 8-inch square pan with baking or parchment paper.
  2. In a large mixing bowl, add the butter and sugars and beat until pale and creamy. Add the vanilla and egg and beat again until combined. Sift in the flour, baking powder and cocoa powder and stir until combined. Add the chocolate chips and hazelnuts.
  3. Place the chocolate batter into your prepared tin and bake in the oven for 30 minutes or until a skewer inserted in the middle comes out clean. Transfer to a wire rack to cool completely.
  4. Next, make the hazelnut crumbs. Crush your hazelnuts using a food processor, a mortar and pestle or by hand until they become fine crumbs. In a large mixing bowl, add your hazelnut crumbs, plain flour, sugar, cornflour and cocoa powder. Whisk together.
  5. Melt your butter and add it to the mixture, stirring until it forms wet crumbs. Pour this mixture out onto a baking tray lined with baking paper and spread out into one layer. Bake for 10 minutes, then leave to cool completely.
  6. To make the chocolate ganache, roughly chocolate dark chocolate and add to a small bowl. Pour over the cream and the pop in the microwave for 20 second bursts, stirring in between, until chocolate has melted. Put the ganache in the fridge for about 15 minutes to thicken.
  7. Pour your ganache all over your chocolate slice, then scatter over your chocolate crumbs. Slice into small squares and enjoy!

Nutrition Information

Serving Size: 1 slice Calories: 450
Nutrition information is a guide only.
Author: Jessica HolmesCategory: DessertCuisine: American
Recipe Card powered byTasty Recipes