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Tapioca Cream Soup
Put into a muslin bag a table-spoonful each of celery and Spanish onion, very finely chopped, the same of grated carrot, a tea-spoonful of grated cocoa-nut, a salt-spoonful of mignonette pepper, and a small bunch of herbs. Tie up the bag, put it in a pint of stock, boil up, and keep it just simmering for half an hour; then remove the bag, giving it a good squeeze. Sprinkle in three ounces of crushed tapioca, stirring well, and boil for twenty minutes. Beat up the yolks of three eggs; heat gently a quart of milk and a gill of cream until about blood-heat, mix it with the eggs, then add the stock very gradually. Return the whole to the pan, stir until it is on the point of boiling, then serve. Probable cost, 1s. 4d.
A Victorian egg-thickened cream soup in which the vegetables never enter the bowl — they flavour the stock from inside a muslin bag and are then discarded. The whole dish stands or falls on the final custard step.
- The hinge: do not boil the finished soupAn egg liaison of three yolks is at risk of curdling if the pan comes to a boil, though the tapioca starch already in the soup gives it some protection. Bring it only to around 180F, stirring constantly, and pull it off the heat as soon as it thickens.
- Temper properlyThe instruction to warm the milk and cream to "blood-heat" (roughly 98F) before mixing with the beaten yolks is the safeguard against scrambling, and the hot tapioca stock must then go in "very gradually" — a ladleful at a time, whisking.
- UnitsA gill is 5 fl oz in a British book (about two-thirds of a cup). The pint of stock is an imperial pint, 20 fl oz. A salt-spoonful is about a quarter teaspoon.
- Mignonette pepperCoarsely cracked pepper, usually described as white, though some sources give it as a mixture of white and black, occasionally with other spices. Cracked white pepper is the closest thing on a modern shelf, and it leaves no dark specks in a pale soup.
- Crushed tapiocaBroken or granulated tapioca, not the large pearls sold for bubble tea and not instant tapioca. Three ounces (about 85 g) in a pint of stock will set almost to a paste before the dairy goes in — that is expected, and it loosens once thinned.
- Grated cocoa-nutFresh coconut, grated. Unsweetened desiccated coconut works; sweetened flake does not belong in a stock.
- Spanish onionAny large sweet onion. The point is mildness, since the bag is only simmered half an hour and then squeezed for its juices.
- YieldRoughly three imperial pints of finished soup — six to eight small first-course servings. Season at the end, after the dairy, or the salt will read as flat.
Tapioca reached British kitchens in quantity in the nineteenth century as a cheap starch from cassava root, marketed alongside sago and arrowroot as a light, easily digested thickener, and cookery writers of the period recommended all three for invalids and children as much as for the dinner table. Its appearance in a cream soup follows the older French logic of the potage lié, where a starch and an egg-and-cream liaison together give body without a flour roux. The muslin bag is characteristic of the same tradition: the aromatics are treated as seasoning to be extracted and thrown away, leaving the soup perfectly smooth and pale, which was the mark of refinement in a white soup. The habit of printing a "probable cost" — here 1s. 4d. — was a convention of more than one period work, and reflects an audience of middle-class households working to a weekly budget, for whom a quart of milk and a gill of cream was a calculable expense rather than an afterthought.