Those delicate golden threads draped over Bolo Rei (recipe on the site) or piled on top of Toucinho do Céu (recipe on the site) are fios de ovos, literally egg yolk threads, made by drizzling beaten yolks through a fine funnel into simmering sugar syrup until they set into impossibly thin strands.
It looks like something only a pastry chef could manage, and the first batches may not be perfect, but once you get the rhythm it becomes almost meditative.
It is less a stand-alone recipe than a technique, one that runs all through Portuguese convent baking: tucked into cakes, spooned over puddings, or eaten straight from the bowl.
The tool matters more than the technique: a proper fios de ovos funnel, with its cluster of tiny holes, makes this genuinely easy, while a plastic squeeze bottle with a pinhole is a reasonable stand-in.
A batch made a few days before Christmas keeps in the fridge, ready to drape over any dessert that needs extra shine. It really does look like spun golden thread, and it makes even a simple dessert look like it came from a Lisbon pastry counter.
Fios de Ovos Recipe
Ingredients
- 12 large egg yolks, at room temperature
- 2 cups granulated sugar
- 1 cup water
- 1 teaspoon fresh lemon juice
- A fios de ovos funnel, or a plastic squeeze bottle with a very fine pinhole tip
Instructions
- Strain the egg yolks through a fine sieve into a bowl, pressing gently with a spoon; this removes the stringy chalazae and any bits of white, which keep the threads from being smooth. Let the strained yolks sit at room temperature while you make the syrup.
- In a wide, shallow pan (a wide skillet works better than a narrow pot, since you need surface area), combine the sugar, water, and lemon juice. Bring to a boil over medium heat without stirring, then reduce to a gentle simmer.
- The syrup is ready when a drop placed in cold water forms a soft, pliable ball, or roughly 235 to 240°F on a candy thermometer; keep it at this gentle simmer throughout, adjusting the heat as needed.
- Pour the strained yolks into your funnel or squeeze bottle. Holding it a few inches above the simmering syrup, drizzle the yolks in a thin, continuous back-and-forth motion across the surface, letting them fall into fine threads.
- Let the threads cook for about 20 to 30 seconds, until they turn from wet yellow to a matte, set gold and float slightly. Lift them out gently with a slotted spoon or two forks and transfer to a plate.
- Repeat in small batches, keeping the syrup at a steady simmer between additions and skimming out any threads that clump before they can overcook.
- Gather the cooked threads loosely into nests as you go, rather than a flat pile, so they keep some airiness. Use immediately while warm and pliable, or cool completely and refrigerate in an airtight container for up to 4 days.
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