We make pierogi's every year for Christmas Eve as a family over at my sis's house. My great grandmother on my mom's side emigrated to the US from Poland, and it's her recipes (with a few tweaks here and there of our own) that we use. This is her dough recipe as passed down to us (although my sis now uses a tweaked version with sour cream instead of milk to make the dough more easily to work with):
3 whole eggs
3 cups lukewarm whole milk
5 lbs flour (we use AP, but I'm hoping to try a type 450 Polish flour this year that I found at a store nearby)
1/2 tsp salt
Mix the eggs, milk and salt in a bowl. Pour the flour out onto a mixing board and make a well in the center. Add the liquid ingredients a little at a time to the flour and mix in with your hands until it makes a dough. Knead 10 to 15 minutes tops, adding more flour or liquid if needed to make a smooth, satiny dough that's just to the point that it no longer sticks to the hands (don't go overboard with extra flour or you'll make it too dry).
Place in a bowl covered with a damp cloth to keep it soft and from drying out (or place it in a Ziploc bag). Let rest for 1 hour on the counter (or overnight in the fridge if you're making it a day ahead) before rolling out.
To roll out, pull smaller portions off the main hunk of dough at a time (leaving the rest covered until needed) and roll out to 1/8" thickness on a lightly floured surface, making sure to not get any flour on the side of the dough you will be placing the filling on.
Cut into circles. We use a drinking glass as our dough cutter....it's about 2.5 to 3" in diameter, I think.
Once cut, we take a circle, stretch it out ever so slightly a little with our hands to bring them to a thickness that's just a little less than 1/8" and then dollop about a tablespoon or so of filling into the center of the circle. Be careful not to over-fill or they could break in the boiling water (this might take a little bit of trial and error before the amount becomes instinctive).
Next, we dip a finger into a bowl of water we handily have standing nearby, and with it we slightly dampen only one half of the circle. Be careful to not go overboard with the water......you want it just damp, not soaking wet (that's why we dampen only 1/2 of the circle), or else the dough will have a hard time sealing properly and it will come apart when boiling.
Once 1/2 of the circle is dampened, we fold the dough in half over the filling to bring the edges together, and then we pinch them sealed with our fingers, although a few of the younger members of our family feel better using a fork. If dampened properly, it will pinch together/seal wonderfully. When doing this, though, it is very important to keep any part of the filling from creeping/spreading out onto the edges that will be pinched closed, or else they won't seal properly and are guaranteed to break open when boiling. Before we place them in the pot of boiling water, a seasoned, designated member of our familial 'crew' inspects the seals on each pierogi to make sure they are pinched closed well and good, because we normally have a few first-timers on the assembly line that aren't up to snuff yet. lol
.
Then we place them in a large pot of boiling water, and once they float up to the top, we continue boiling them for 2 to 3 extra minutes before taking them out and placing them in a holding pan and basting with melted butter.
IrishLass