Hedgehog honeycomb slice

Honeycomb

• 1 tbsp bicarbonate of soda
• 300 g white sugar
• 1080 g water
• 20 g honey
• 50 g white vinegar

Chocolate mixture

• 200 g roasted unsalted macadamia nuts
• 200 g shortbread biscuits, broken or cut into pieces (1 cm)
• 600 g dark chocolate, broken into small pieces (see Tips)
• 150 g golden syrup
• 150 g salted butter, softened and cut into pieces