Place the butter in a heavy-based pan and melt gently.

Melt the butter and oil together in a large, deep, heavy-based pan.

Place the dark and milk chocolate pieces into a heavy-based pan.

Place the sugar, glucose and water in a heavy-based pan.

Heat the oil and butter in a large, heavy-based pan.

Warm a shallow layer of oil in a heavy-based pan.

Heat the remaining oil and half of the butter in a heavy-based frying pan.

Heat a small amount of olive oil in a heavy-based frying pan.

In a large, heavy-based frying pan, heat the butter and oil.

Place a large, heavy-based pan over medium heat and add olive oil.