Place the softened butter into you mixer bowl with the icing sugar, and beat until creamy and pale.

Sift the custard powder and flour in preparation, and add to the creamed mixture.

Gently combine all the ingredients. Press into chunks of mixture.

Place a piece of baking paper on the bench and place each chunk onto it. Gently mould into a log.

Using the baking paper - shape the log.

Wrap the log in the baking paper and place into the fridge for twenty minutes.

Take out once firm and slice into twenty equal pieces.

Place on the prepared trays and place into the oven for 15 minutes.

Leave on the trays for 10 minutes and then transfer to a cooling rack.

This will store in an airtigt container for over a week. It also freezes well (up to three months).