The premise inverts the timeline: steam heat reached sugar boiling long before the first gummy candy existed. Edward Charles Howard patented a closed, steam-heated vacuum pan for sugar in 1813, and confectioners were boiling sugar in revolving steam pans by 1851. Haribo's Hans Riegel did not make the first gummy bears until the early 1920s. The same principle powers the steam-jacketed kettle, a double-walled vessel heated by steam between the walls. The open-pan methods that came first belonged to the older confections, fruit pastes, jellies, gumdrops, and boiled sweets, which were cooked in open copper kettles over fire and stirred by hand with long wooden paddles.
These older methods produced clear differences in both flavor and texture:
Flavor Differences
- Scorching and burnt notes: Direct heat can create hot spots, causing sugar to caramelize unevenly. This often led to a slightly burnt or overly caramelized flavor, especially near the bottom and sides of the kettle.
- Inconsistent sweetness: Without precise temperature control, some batches might have a more cooked, less sweet taste because of partial sugar degradation, while others could be cloying if the heat was too low.
- Loss of delicate flavors: Fruit and flavor oils are volatile. Prolonged exposure to high temperatures from direct flame can cause these compounds to evaporate, resulting in a muted or “cooked” flavor profile.
Texture Differences
- Grittiness and crystallization: Inconsistent heating and cooling can promote the formation of sugar crystals, leading to a gritty or sandy mouthfeel rather than the smooth, chewy texture we expect today.
- Air bubbles and density: Manual stirring introduces less control over aeration. Some batches would have large air pockets, making the gummy less dense and more prone to sticking, while others could become overly dense and tough.
- Uneven gel strength: The gelatin or pectin needs a steady, even temperature to hydrate and set properly. Fluctuations from direct heat could cause uneven setting, resulting in gummies that were too soft in some spots and too firm in others.
- Stickiness or weeping: Without the gentle, uniform agitation of a steam-jacketed kettle (which prevents localized overheating), the syrup could reach temperatures that degrade the gelling agents. This might cause the final product to “weep” moisture or become sticky to the touch.
Steam-heated cooking was already standard by the early 1920s, when the first gummy bears were made, so gummy syrup was never cooked over open flame at scale. Steam-jacketed kettles ended the scorching, crystallization, and flavor loss that came with the open copper kettle. No more burnt batches. The smooth, uniform gummy is a steam-era product.