Home › Menu III › Banana Sponge
Banana Sponge
Soak half a tablespoonful of gelatin in four tablespoonfuls of cold water, dissolve in a quarter cup of boiling water. Take a cup of banana pulp, mashed through a coarse sieve, add half a cup of confectioners' sugar and three tablespoonfuls of lemon juice. When the gelatin begins to thicken, add this mixture to it. Then add the stiffly beaten white of one egg. Put in paper cases, chill, sprinkle with chopped nuts just before serving.
The problem here is structural, not a matter of dated measurements: the raw egg white is the aerator, and nothing in the method ever heats it.
- The raw white is never cookedThe only warm liquid is a quarter cup of boiling water used to dissolve the gelatin, and it is diluted and cooling by the time the fruit mixture goes in. The beaten white is folded into a cold, acidic base and then chilled, so nothing approaches the temperature at which Salmonella in egg is destroyed.
- Lemon juice is not a safeguardThree tablespoonfuls of lemon juice into a cup and a half of sweetened pulp gives a mildly acidic dessert, well short of anything that would reliably kill pathogens, and acid on its own does not pasteurise egg in any case.
- Chilling preserves the riskRefrigeration slows bacterial growth but destroys nothing already present. A sponge held cold for hours and then served at the table sits in the range where any contamination survives intact.
- Who it endangersUncooked egg white desserts are a recognised hazard for children, older adults, pregnant women and anyone immunocompromised. The dish predates the modern understanding of Salmonella in intact shell eggs, and a time when reliable home refrigeration was not universal.
- If you want a banana spongeUse a current recipe built for the purpose. We are not offering an adjusted version of this one.
Gelatin "sponges" and "whips" were a fixture of American light cookery from the late nineteenth century onward, once powdered granulated gelatin made setting a dessert a matter of soaking and stirring rather than boiling calves' feet. The method typically runs the same way: bloom the gelatin, flavour it with fruit and sugar, catch it at the moment it begins to thicken, and beat or fold in egg white so the setting jelly traps air and swells. Bananas entered this repertoire as the fruit trade made them a cheap year-round staple in North American cities, and they suited the technique because their pulp sieves smooth without cooking. The paper cases and a scatter of chopped nuts do the work of presentation. That avoidance of the stove is precisely what makes the recipe unusable now.