If I had to pick a favorite recipe of all time, I think it might be this potato and cheese pierogi recipe handed down to me by my Polish grandmother.
1. Achieving a very thin dough (1/8-inch or less) is crucial for delicate pierogi; use minimal extra flour to avoid a tough result. Rest the dough adequately for easier handling.2. Ensure the mashed potatoes are completely cooled before combining with the cheese and onions. Warm potatoes can alter the texture of the farmer's cheese and make the filling too soft.3. When sealing the pierogi, moisten the edges well and press firmly to create a robust seal. Work from the center outwards to avoid trapping air, which can cause the pierogi to burst during boiling.4. The two-stage cooking—boiling followed by pan-frying in butter—is key to achieving both a tender interior and a beautifully golden, slightly crisp exterior. Don't skip the browning step for maximum flavor.