1/4 cup powdered custard
1/4 cup powdered milk
2 boiled eggs, yolks only
1/4 cup milk
1/2 cup powdered sugar
1/3 cup margarine
9 ounces pizza dough
Yellow food coloring
Candy eyes and moustaches, to decorate
Sift the powdered custard and powdered milk, discarding any lumps. In a food processor, add the egg yolks, milk, powdered custard and powdered milk and blend to a smooth paste. Add the sugar and margarine and process until smooth. Transfer the mixture into a shallow dish, cover it with plastic wrap and freeze overnight.
Color the dough by kneading in the food coloring. Once it’s smooth and the color is fully mixed in, place dough in a covered bowl and let it rise for 1 hour or until it’s doubled in size.
Once risen, divide the dough into 4 pieces. Working with one piece at a time, roll each piece into a 3-inch circle. Scoop one tablespoon of frozen custard mixture into the middle, and seal the dough into a ball around it. Put the ball onto a small piece of greaseproof paper, seal pointing down, inside a bamboo steamer. Leave to rise for 30 to 45 minutes, until doubled in size again, then steam the buns over boiling water for 8 minutes.
Let the buns stand for 2 minutes before serving, then poke with a straw to reveal the custard.