Pierogi Dough

Mound the flour on a clean work surface and make a wide well in the center. Add the egg yolks, sour cream, warm water, and salt to the well. Beat the wet ingredients gently with a fork, then gradually incorporate the flour from the inner walls of the well, stirring in a widening spiral. When the mixture becomes too thick to stir, begin kneading with your hands — flour from the edges inward, pressing and folding. The dough will come together into a rough, slightly sticky mass.

Knead the dough on a lightly floured surface for 5-8 minutes using a push-fold-turn rhythm: push the heel of your hand forward, fold the dough back over itself, rotate a quarter turn, repeat. The dough transforms from rough and lumpy to smooth and supple. It should not require much flour — add only enough to prevent sticking. Once smooth, wrap tightly in plastic wrap and rest at room temperature for 30 minutes. This rest is essential: it relaxes the gluten so the dough can be rolled paper-thin without springing back.

Divide the rested dough into two halves (keep one half covered while working the other). On a lightly floured surface, roll with a rolling pin from the center outward, turning the sheet a quarter turn after every 3-4 passes. The goal is a uniform sheet 2mm thick — thin enough to be almost translucent when held up to light, but not so thin it tears. Cut circles with a 7-8 cm round cutter or an upturned glass. Re-roll scraps once.

Bring a large pot of well-salted water to a rolling boil. Work in batches — no more than 8-10 pierogi at a time to prevent sticking and temperature drops. Lower the pierogi gently with a slotted spoon. They will sink to the bottom, then float up as they cook. Once they float, cook for a further 2-3 minutes for a total of 4-5 minutes from entry. Remove with a slotted spoon, drain, and toss immediately with melted butter to prevent sticking.