To make the macaroni, melt the unsalted butter over medium-low heat.

If possible, use unsalted or only very slightly salted butter.

Is there a difference between salted and unsalted butter?

Grease a 20cm/8in deep pie tin with unsalted butter.

Therefore, using unsalted butter and adding your own salt gives the cook much more control.

Whisk in the remaining tablespoon of brandy and the cold unsalted butter.

Add unsalted butter, and process for 20 to 30 seconds.

For richer gravy, whisk in 1 or 2 tablespoons unsalted butter.

Start with unsalted butter (any good brand will do fine, as long as it is fresh).

Melt 2 tablespoons of the unsalted butter in a saucepan over medium heat.