How do you harden treacle or normal toffee that set?

To harden treacle or normal toffee that has set, you can use the following methods:

Refrigeration: Place the toffee in an airtight container and refrigerate it for several hours or overnight. The cold temperature will help to harden the toffee.

Freezing: For a harder toffee, you can freeze it instead of refrigerating it. Place the toffee in an airtight container and freeze it for at least 4 hours or overnight.

Boiling: You can also harden toffee by boiling it. Place the toffee in a saucepan and add a small amount of water. Bring the mixture to a boil over medium heat, stirring constantly. Continue to boil for 1-2 minutes, or until the toffee has thickened and hardened.

Microwave: If you don't have time to refrigerate, freeze, or boil the toffee, you can also harden it in the microwave. Place the toffee in a microwave-safe dish and heat it on high power for 10-15 seconds at a time, stirring in between. Continue heating until the toffee has reached the desired hardness.

Once the toffee has hardened, you can store it in an airtight container at room temperature for up to 2 weeks.