Ingredients CardPierogi Ruskie27.5 pierogi · about 1 kg Potato and Cheese Filling 250 gfloury potatoes, peeled150 glarge onion, finely chopped≈ 14 gbutter150 gfull-fat twaróg (Polish farmer's cheese)≈ 1.5 gsalt≈ 0.6 gground black peppersalt for the potato water, to taste Dough 250 gall-purpose flour≈ 1.5 gsalt≈ 125 ghot water≈ 28 gcanola oil Shaping, Boiling and Frying ≈ 55 gonion, chopped≈ 14 gbutter≈ 4000 gwater for boilingsalt for the water, to taste