| Pasta type, amount, and cooking | Ultra-thin fresh fettuccine (250g 00 flour + 250g type 0 semolina + 7 eggs, serves 6) - 110g per serving - boiled just 30 seconds | Ultra-thin fresh fettuccine for 4, rolled to near the machine's thinnest setting. Boils in about 30 seconds | Fresh homemade tagliatelle/fettuccine (200g 00 flour + 2 eggs, serves 2). Boiled about 3 minutes, with cooking water reserved (about a mugful) at the 2-minute mark | Fresh homemade fettuccine (400g 00 flour + 4 eggs), boiled 2-3 minutes | Half a pound of fresh fettuccine (serves 2), boiled per package directions in salted water | 400g dried fettuccine, boiled per package time with 1/2 cup cooking water reserved |
| Salt in the cooking water | Plenty of salted water (no salt quantity given) | Generously salted water (no figure given) | 1 tablespoon rock salt in the pot | Salt (amount given as "to taste") | Salted water (amount not given) | Salted water (amount not given) |
| Handling of butter | 20-25g of room-temperature butter per serving, laid out on a warmed tray | 4 Tbsp (about 60g) unsalted butter, thinly sliced onto a large platter | 80g of quality grass-fed butter, cut into large pieces, into the bowl (unsalted vs. salted not specified in the source) | One stick (80g) unsalted butter, melted slowly without browning in a large frying pan over very low heat | No butter used - emulsified entirely with 2 cups of heavy cream | 115g unsalted butter used together with 300ml heavy cream |
| Whether cream is used | Not used | Not used | Not used | Not used | 2 cups of heavy cream, boiled and reduced over direct heat | 1.25 cups heavy cream, lightly reduced with the butter over medium heat for 3-4 minutes |
| Type and amount of cheese | 70g per serving of 24-month-aged Parmigiano Reggiano, sifted three times into powder | 4oz (115g) Parmigiano Reggiano. States outright that parmesan is not an acceptable substitute | Parmigiano Reggiano (amount given as "as much as you like"), added in two stages | 80g grated Parmigiano Reggiano, added after the heat is turned off | 1/2 cup Reggiano parmesan, added to the cream and reduced together | 2 cups (250g) parmesan, added after the heat is turned off |
| Whether garlic / aromatics are used | Not used | Not used | Not used | Not used | Not used | 5 cloves minced, added off the heat together with the cheese and thyme |
| Method of emulsification | Noodles moved straight from the pot to the warmed tray with a two-pronged fork, then folded with fork and spoon in a three-beat rhythm (mantecatore) | Noodles moved with tongs, cooking water and all, onto the platter of butter, then grated cheese added and tossed briskly with two forks (on the platter, off heat) | Bowl set over the boiling pot so steam melts the butter; then removed from the pot and cooking water added in three stages while the cheese goes in over two stages | Cooking water added to the pan, then noodles, tossed briefly over direct heat, then heat turned off before cheese is mixed in | Cream boiled in the pan, cheese added, reduced over direct heat until it coats the back of a spoon, then tossed with the noodles | Cream and butter lightly reduced, then heat turned off and cheese, garlic, and thyme whisked in to emulsify before adding cooking water gradually and tossing with the noodles |
| Heat level / temperature | No heating equipment - only the residual warmth of the tray | No heat - finished entirely off the stove, on the platter | No direct flame - only indirect heat from the pot's steam | Butter on very low heat; direct heat again briefly once noodles go in, then off right before adding cheese | Direct heat throughout - the cream is actively reduced to build body | Cream brought to a light boil over medium heat, then finished off the heat entirely |
| Finish | No notable additions - served as tossed | None in particular - served immediately once tossed | Extra Parmigiano to taste before serving | A pinch of salt and plenty of freshly ground black pepper | Extra cheese and black pepper, served immediately | Extra parmesan and black pepper added before serving |
| Time required | Not specified (a few minutes to plating) | 10 minutes cooking time | 5 min prep, 10 min cooking, 15 min total (serves 2; the 10-minute dough rest is separate) | 30 min prep, 5 min cooking (dough separately rested 30 min), serves 4 | Under 30 minutes | 10-15 minutes cooking |
| Source check | Source verified | Source verified | Source verified | Source verified | Source verified | Source verified |