The box contains the basic powdered ingredients to allow for the easy making of two Custard Tart fillings with only the addition of half a pint of milk for each tart. The box says it is a ‘No-Bake’ filling but it needs to be mixed with boiling milk; and you would have to make or buy a pre-baked 6” pastry tart case.
The instructions to make the filling were:
- Pour the powdered contents into a saucepan.
- Blend the powder with a half pint of milk.
- Bring the milk to the boil and cook for 1 minute.
- Pour the filling into the pastry case, sprinkle with nutmeg and leave to set for 1 hour.
The powdered filling was made by a company called Royal Powder Co., part of Standard Brands in Liverpool in 1929. The Royal Baking Powder Co., along with four other companies including the Fleischmann’s Yeast Company, merged to form Standard Brands, the number-two brand of packaged foods in America after General Foods. Through a further merger, Standard Brands itself became part of Nabisco in 1981.