Ingredients CardPierogi Ruskie55 pierogi · about 2.1 kg Potato and Cheese Filling 500 gfloury potatoes, peeled300 glarge onion, finely chopped≈ 29 gbutter300 gfull-fat twaróg (Polish farmer's cheese)≈ 3 gsalt≈ 1 gground black peppersalt for the potato water, to taste Dough 500 gall-purpose flour≈ 3 gsalt≈ 250 ghot water≈ 57 gcanola oil Shaping, Boiling and Frying ≈ 110 gonion, chopped≈ 29 gbutter≈ 4000 gwater for boilingsalt for the water, to taste