Weigh and combine the flour(s) in a wide mixing or serving bowl.
Weigh the liquid(s) and, if applicable, whisk them together until smooth.
Keep the flour in the bowl (this prevents runaway liquids) or turn it out onto a work surface.
Make a wide “well” in the center with your fist, forming a wall of flour tall enough on all sides to contain the liquid.
Pour the liquid into the well.
Using a fork, gradually incorporate a portion of the flour, a couple of teaspoons or so at a time, from the inner rim of the well into the liquid in a circular motion (à la scrambled eggs) until a thick, custardy batter forms. You’ll use only about a quarter of the flour at this point; the majority will remain loose.
Incorporate the remaining flour into the thickened liquid, either by:
1) pulling, folding, and pressing the flour into the center with your hands until it becomes a shaggy ball;
2) vigorously whisking the liquid and loose flour together with the fork until all the liquid is evenly distributed (and it looks like little flaky pebbles); or
3) if you’re working on a flat surface, cutting the flour into the liquid with the help of a bench scraper. If it looks like a total mess—sticky here, flaky there—you’re doing it right.
If you’ve been using a bowl, transfer the mixture to a flat surface, along with any large flaky pieces. It’s also totally normal to have some flour left behind.