Equipment
Ingredients
Honeycomb
- 150 g granulated sugar, dry
- 75 g golden syrup
- 30 ml water
- 8 g baking soda, sifted
Chocolate Base and Biscuits
- 300 g dark chocolate
- 50 g unsalted butter, cubed
- 30 g golden syrup
- 150 g digestive biscuits, crushed into rough 1 cm pieces
- 3 g flaky sea salt
Nutrition (per serving)
Nutrition is estimated per serving. Nutrients without complete source data are omitted.
Full nutrition
- Calories
- 230 kcal
- Protein
- 2 g
- Carbohydrates
- 32 g
- Fat
- 11 g
- Fiber
- 2 g
- Sugar
- 25 g
- Sodium
- 356 mg
- Saturated Fat
- 6 g
- Potassium
- 110 mg
- Calcium
- 12 mg
- Iron
- 1.6 mg
- Magnesium
- 29 mg
- Phosphorus
- 41 mg
- Zinc
- 0.4 mg
- Vitamin A
- 22 mcg
- Vitamin C
- 0 mg
- Water
- 3 g
Sources: Aggregated Public Data, USDA FoodData Central
Method
Line the 20 cm square baking tin and a separate baking sheet with parchment paper, leaving an overhang on the tin edges for easy removal.
Combine 150 g granulated sugar, 75 g golden syrup, and 30 ml water in a deep heavy-bottomed saucepan over medium heat at 100°C (212°F), swirling gently until the sugar dissolves completely.
Bring the syrup to a rapid boil without stirring until the mixture reaches 150°C (302°F) on a digital candy thermometer, entering the hard-crack stage.
Remove the saucepan from the heat immediately, tip in the sifted 8 g baking soda, and whisk vigorously for 4 seconds until the mixture expands into a foaming, pale golden aerated mass.
Pour the hot bubbling honeycomb immediately onto the prepared parchment-lined baking sheet and allow it to cool undisturbed at room temperature for 25 minutes.
Break the cooled honeycomb into rough 1 cm to 2 cm shards, and crush the 150 g digestive biscuits into matching rough pieces, reserving one-third of the honeycomb shards for the garnish.
Place 300 g chopped dark chocolate, 50 g cubed unsalted butter, and 30 g golden syrup into a heatproof bowl set over a pan of gently steaming water at 55°C (131°F), stirring until completely melted and glossy.
Remove the chocolate bowl from the steam and let it rest for 3 minutes to cool slightly, then gently fold in the crushed biscuits and two-thirds of the honeycomb shards until evenly coated.
Transfer the mixture into the prepared 20 cm square tin, pressing it gently with a silicone spatula into an even, compact layer.
Scatter the reserved one-third honeycomb shards across the surface, press them lightly into the top layer to adhere, and sprinkle evenly with 3 g flaky sea salt.
Refrigerate the tin for 2 hours until the chocolate slab is completely solid, then lift out using the parchment overhang and slice into 16 even squares using a warm, dry chef knife.
Chef's Notes
- Sifting the baking soda through a fine-mesh sieve beforehand is essential; any tiny compacted clumps will fail to disperse and leave bitter, alkaline pockets in your finished honeycomb.
- Do not scrape the bottom or sides of the saucepan when pouring out the foamed honeycomb; cooler, un-aerated syrup clinging to the pan will create hard, dense patches in the aerated sheet.
- A bittersweet chocolate with 60 to 70 percent cocoa solids provides an essential bitter counterpoint that balances the high sweetness of golden syrup and honeycomb.
- To cut clean, bakery-level edges without cracking the top honeycomb shards, score the top chocolate layer lightly first with a serrated knife before pressing down firmly with a warmed chef knife.
Storage
Refrigerator: 1 week — Store in an airtight container separated by sheets of parchment paper to prevent ambient moisture from softening the exposed honeycomb shards.
Freezer: 1 month — Wrap tightly in plastic wrap and keep in an airtight freezer bag. Thaw in the refrigerator for 1 hour before serving to avoid moisture condensation.
Reheating: Serve chilled or slightly below room temperature. Do not heat.
Troubleshooting
The honeycomb collapses into a flat, chewy toffee rather than an airy, crisp structure
Cause: The sugar syrup was not boiled to the hard-crack stage of 150°C (302°F), or the mixture was over-stirred after adding the baking soda
Fix: Cannot be fixed once poured; the batch must be remade for proper honeycomb aeration, though the chewy toffee can still be eaten as candy
Prevention: Use a calibrated candy thermometer to confirm the hard-crack point and whisk the baking soda for no more than 4 to 5 seconds before immediately pouring
The melted chocolate mixture turns stiff, grainy, and greasy during melting
Cause: Water droplets contaminated the chocolate causing it to seize, or the melting temperature exceeded 60°C (140°F)
Fix: Vigorously whisk in 15 ml of warm boiling water or warm cream a teaspoon at a time to restore the emulsion
Prevention: Ensure all bowls and utensils are dry and keep steam from curling over the rim of the double boiler
The honeycomb pieces inside the chilled chocolate slice turn sticky or soggy after 24 hours
Cause: Ambient refrigerator humidity reacted with the hygroscopic sugar structure of exposed honeycomb
Fix: Cannot be fixed once dissolved; store remaining bars in an airtight container with parchment sheets
Prevention: Ensure internal honeycomb pieces are thoroughly coated by the chocolate fat barrier, and keep the set bars sealed tightly in an airtight container
Cultural Context
Known variably as cinder toffee, sponge candy, puff candy, or hokey pokey, honeycomb confectionery has deep roots across British, Australian, and Commonwealth sweets traditions. Combining this airy, caramelized candy with tea biscuits and dark chocolate draws inspiration from the classic British chocolate tiffin and the beloved Australian chocolate crunch slice, elevating pantry baking staples into a multifaceted textural confection.
