Common Honeycomb Toffee Mistakes

What it means

• Undercooking below the hard-crack stage leaves too much moisture, so the honeycomb is chewy rather than crisp.
• Overcooking past deep amber tastes burnt and bitter because the sugar has scorched.
• Old baking soda, too much of it, or lumps that are not whisked in fully give a weak rise or a soapy, metallic taste.
• Stirring, spreading, or pressing the mixture after pouring knocks out the carbon dioxide bubbles and gives dense, flat honeycomb.

Action steps

1. Use a candy thermometer and cook to 149-154 C (300-310 F) so it is fully hard-crack.
2. Pull the pan off the heat as soon as it reaches deep amber to avoid burning.
3. Measure fresh baking soda, sift out lumps, and whisk it in quickly and evenly.
4. Pour and then leave it completely alone to set; never stir or spread it.
5. Work on a dry day and store airtight to keep it crunchy.

Risks & deadlines

• Molten sugar is around 150 C and burns badly, so add the baking soda carefully as the mixture erupts and foams.
• Humidity ruins texture, so avoid making honeycomb on damp days.