| Noodles, quantity, cooking | 300g spaghetti (serves 4), 5L water | 320g spaghetti (11.5oz, serves 4), boiled half the package time | 450g fresh spaghetti (1lb) | 1lb dried spaghetti, 7-8 minutes | 1.6mm, 100g, cooked one-pan in consommé water | 320g tagliatelle (serves 4) |
| Salt in the pasta water | A fistful of rock salt (percentage not given) | Salted water (percentage not given) | Kosher salt in the water (percentage not given) | Salted water (amount not given) | 1.5 tsp consommé powder + a pinch of salt (in 350cc of seasoned water, not plain boiling water) | Salted water (percentage not given) |
| Fat (butter, olive oil) | 4 tbsp olive oil (butter can substitute) | 100g butter (7 tbsp, used warm and cold in two stages) | About 70g unsalted butter (5 tbsp) | 2 tbsp olive oil + 2oz (1/2 stick) butter | 10g butter (added at the end only, no garlic) | 3 tbsp olive oil + 25g butter |
| Garlic, present or not | None | None | 1 clove (minced) | 1 clove (minced, not browned) | None | 1 clove (minced) + 1/4 red chili |
| How the lemon is used (zest, juice, amount) | 2 lemons (zest of 2, juice of 1, split between bowl and pan) | Zest of 2 + 4 tbsp (60g) juice | Zest of 1, juice added by taste starting from 1 tbsp | Juice of 1 lemon + thin zest strips (some reserved for garnish) | 2 tsp juice (from half a lemon) + zest of half a lemon + slices for garnish | Zest and juice of 1 unwaxed lemon |
| Cheese | 300g pecorino | 80g Pecorino Romano DOP (loosened with hot water into a cream) | About 30g Parmigiano-Reggiano plus more to finish | Parmesan (optional) | None | 20g Parmesan, more optional to finish |
| Cream, present or not | None | None (richness comes from butter and cheese cream) | None | 1 cup heavy cream | 100cc heavy cream (35% fat specified) | None |
| Emulsion method | Pecorino, pasta water, and lemon juice built into a cream in the bowl first, then tossed with the pasta | Cheese emulsified separately in hot water; pasta finished directly in the pan with pasta water | Less water in the boil concentrates the starch, then it's emulsified with the pasta directly in the pan | Cream reduced in the pan, pasta tossed in off the heat | Cream and lemon juice brought to a boil directly in the pan, then emulsified with butter off the heat | Pasta water and butter combined in the pan, emulsified directly with lemon juice over heat |
| Finish | More pecorino, lemon zest, mint | Cold butter, more lemon zest, basil, black pepper | More lemon zest, more cheese, black pepper | Reserved zest, parsley, optional lemon slices for garnish | Lemon slices, zest, ground pepper | Parsley, more Parmesan, lemon zest |
| Time required | About 15 minutes (5 min prep, 10 min cooking) | About 20 minutes (5 min prep, 15 min cooking) | About 25 minutes | About 20 minutes (10 min prep, 10 min cooking) | 25 minutes | Not specified |
| Source check | Source verified | Partly unverified | Source verified | Partly unverified | Partly unverified | Partly unverified |