| Pasta, portion, and boiling | 1.7–2mm, 100g, 1 min under package time | 2.2mm, 70g | 1.9mm, 60g, 10 min | 100g, 30 sec under package time (restaurant uses 1.6mm bronze-die) | 1.6mm, 160g for 2, 1–2 min under package time | 1.4mm, 140g for 2, 1 min under package time | 300g thick spaghetti, 13 min | 340g rigatoni or spaghetti | 450g spaghetti for 4 |
| Salt in the pasta water | 1% of the water | 1.5% of the water | 1.5% of the water | about 2% of the water | 1% of the water | 1.5% (2.5 tbsp in 3L water) | 1/2 tbsp rock salt (% unknown) | about half the usual amount | kept light (no % given) |
| Water volume | not stated | not stated | not stated | not stated | 10x the noodle weight or more | 3L for 2 servings | a large pot (amount unspecified) | a large pot (amount unspecified) | a pot a bowl can rest on |
| Pork (rendering the fat) | 40g bacon (cut into strips) + garlic and dried chili | 45g guanciale, large cubes, cooked until crisp | Guanciale, thin-sliced, laid out and seared | 30g pancetta + 20g olive oil, started cold, then low heat | 60g thin-sliced bacon, cooked crisp with no oil | 80g bacon, cooked slowly until crisp, then deglaze the fond with water | 200g thin-sliced guanciale, medium-low heat | 125g guanciale, 1.3cm cubes, medium heat 4–6 min | 85g diced guanciale + olive oil, medium heat 7 min |
| Egg composition | 1 whole egg (L-size) | 3 egg yolks | 1 egg yolk | 2–3 egg yolks | 2 whole eggs (whipped) | 2 whole eggs + 2 yolks (2 servings) | 3 yolks + 1 whole egg | 4 egg yolks (add 1 egg white for a lighter version) | 2 whole eggs + 6 yolks (4 servings) |
| Cheese | 30g grated cheese | 10g Grana Padano + 5g Pecorino (plus finishing) | Parmigiano (equal weight to the yolk) | 30g Parmigiano (grated cheese OK) | 2–3 tbsp Parmesan | 25g grated cheese / 30g Parmigiano | 90g Pecorino (at least 30g per 100g pasta) | 55g Pecorino plus finishing | 25g Pecorino + 25g Parmigiano (50:50) |
| Emulsification method | Direct heat, low, constant stirring | Bowl bain-marie + hand mixer | Tossed in the pan off the heat | Pasta moved into a bowl of egg mixture and tossed | Direct heat, low | Direct heat, medium, with a rubber spatula | Steam heat, holding the pan over the pot | In a bowl using only the pasta's own heat | Double boiler (metal bowl set over the boiling water) |
| Heat and temperature | Cool the pan after sautéing the base, then fixed low heat | Bain-marie to about 65°C | Egg mixture never touches direct heat | Egg mixture kept off the heat, uses residual heat | Repeatedly lift off and return to the heat | Repeatedly on and off the heat, taken off just before it turns silky | Indirect heat, never over direct heat | No stovetop heat used (bain-marie if worried) | Indirect heat, bain-marie |
| Finishing | 2 tsp olive oil, black pepper | Pecorino, black pepper | Black pepper (with fava beans) | Cheese, black pepper | Black pepper | Finished with residual heat, bacon placed on top | Pecorino, guanciale, black pepper | Black pepper, Pecorino | Cheese, black pepper, olive oil |
| Total time | about 15 min | about 20 min | about 20 min | about 20 min | about 10 min | about 20 min | about 25 min | about 20 min | about 30 min |
| Source check | Source verified | Partly unverified | Partly unverified | Source verified | Partly unverified | Partly unverified | Source verified | Partly unverified | Partly unverified |