My great-grandmother's recipe. A little bit of work, but well worth it. We make about 200 every Christmas Eve, and everyone can't wait. The amounts for the ingredients is an estimate, because my great-grandmother does not measure! Serve with a side of sour cream.
Dough consistency is key; since measurements are approximate, adjust flour until the dough is smooth and pliable, but not sticky. Avoid overworking re-rolled dough as it becomes tough. For the filling, ensure mashed potatoes are well-seasoned. When sealing, press firmly with a fork to prevent leakage during boiling. Do not overcrowd the saucepan when boiling pierogies; cook in small batches to maintain water temperature and prevent sticking. Browning in butter adds a crucial depth of flavor and texture. For an extra touch, caramelize the onions a bit longer for sweetness, or add a pinch of paprika during browning.