One Pot Citrus YoYo's 

In a large pot melt:

400 grams (14.11 ounces) of salted butter.

Then add:

The finely grated zest from one orange.

1/2 cup custard powder

1 cup sifted icing (powdered) sugar

3 and 1/2 cups plain flour.

Mix well.

Shape into small balls, then place on baking paper lined trays.

Press down with a fork.

Bake at 180 Celsius  ( 356 Fahrenheit) for 10 - 15 minutes until slightly golden.

Cool.

Join with Orange Icing:

Beat 150 grams (5.29 ounces) of soft butter with the juice of one fresh orange.

Add 1 and 3/4 cups icing sugar.

Beat until creamy.

Join biscuits.

Yield - 54 single biscuits or 27 joined.

The unjoined biscuit can be sprinkled with Icing (powdered) sugar for serving.