Rezdôra’s uovo in raviolo is one large fresh pasta raviolo stuffed with drained ricotta and a whole raw egg yolk — boiled for exactly 90 seconds so the pasta cooks through and the yolk inside stays completely liquid. Cut open at the table, the yolk runs into the sage brown butter on the plate. The dish is centuries old in Emilia-Romagna but Rezdôra makes it one of the most searched pasta recipes in New York. At the restaurant it costs around $30. Four of these at home cost under $10, and the technique is learnable in a single afternoon.
What makes it work: The overnight ricotta drain (wet ricotta collapses and lets the yolk escape), the cold egg yolk (buys you time in the hot water), and the 90-second cook (never 2½ minutes). See the seal technique below.
The Seal Is the Whole Game
Everything about this dish depends on the raviolo not bursting in the water. A burst raviolo loses the yolk and the point of the dish. Three things cause it: air pockets, wet ricotta, and weak sealing.
Air pockets are the most common cause. Once you drape the top circle over the filled base, resist the urge to press the rim first. Instead, start pressing from the inner edge — right next to the ricotta ring — and work outward with your fingertips, pushing air ahead of you until it escapes at the unsealed perimeter. Only after the air is out do you press the rim closed. If you can see any raised dome under the top sheet, peel that section back and reseal it. A finished raviolo should feel dense and solid with no give.
Wet ricotta is the second cause. Whole-milk ricotta from a container contains a large amount of liquid. Un-drained, it flows off the spoon and cannot hold a ring shape — the filling collapses inward when you lower the yolk, and the weight of the top pasta sheet pushes the yolk into direct contact with the steam, where it will overcook. Drained overnight, the ricotta should feel close to cream cheese: it holds a clean curl when piped.
Weak sealing happens when the pasta is too dry (the egg wash didn’t adhere) or too wet (the pasta has been sitting out and absorbed humidity). Work quickly: assemble and boil within 15 minutes, or freeze immediately after sealing.
Why the Pasta Thickness Matters
The yolk survival window depends on the pasta being thin enough to cook through in 90 seconds. At 1.5mm (setting 6 on most 9-roller home pasta machines), fresh egg pasta reaches al dente at exactly the moment the yolk is still fully liquid. At 2mm or thicker, the pasta needs closer to 2½ minutes, and the yolk begins to set. At 1mm or thinner, the pasta is cooked in 60 seconds but is prone to tearing at the seal when you pick up the filled raviolo.
The visual test is reliable: at the right thickness, you should be able to see your hand through the pasta sheet but not read text through it. If you can read text through it, it is too thin.
The other factor is egg content. This dough uses two whole eggs plus two extra yolks for the same amount of flour that standard pasta uses two or three whole eggs. The extra yolk fat makes the dough more pliable at thin settings and produces a richer, more golden pasta that holds its shape in the water without becoming gummy.
The Seasonal Variation
Sage brown butter is the year-round base. In fall — when this recipe is timed — torn golden chanterelles sautéed hard in a very hot pan (2 minutes without stirring to build a crust, then 1 minute more) are scattered around the raviolo. The earthy, woodsy chanterelle flavor reinforces the nuttiness of the browned butter and the richness of the egg yolk in a way that feels like the dish was designed for October.
In winter, a few shavings of fresh black truffle or a few drops of truffle oil finish the plate instead of chanterelles. In spring, blanched English peas or fava beans tossed in the brown butter. The base technique does not change.
