Chef Tips
Render the guanciale low and slow
Start over medium heat, not high. The fat needs 6 to 8 minutes to melt out of the guanciale before the meat starts to colour. Too much heat crisps the outside before the interior fat has rendered, leaving you with tough, chewy pieces. You want the fat translucent and the meat just starting to turn golden at the edges. The rendered fat left in the pan is the flavour base for the whole sauce.
Use the pasta water
Reserve at least ½ cup of the pasta cooking water before you drain. The starch in it is what helps the sauce coat and cling to the spaghetti. Add a quarter cup when you transfer the pasta to the sauce pan and toss vigorously over medium heat so the sauce emulsifies rather than sitting separately on the pasta. Add more water a splash at a time if the sauce gets too tight. This step makes the difference between pasta with sauce on top and pasta properly dressed in sauce.
Storage
The sauce (without pasta) keeps in the fridge for up to 4 days or in the freezer for up to 3 months. This recipe deliberately makes enough sauce for 2 serves. Reserve the second portion in an airtight container straight after cooking. To use later, reheat the sauce in a pan, add freshly cooked pasta with a splash of pasta water, toss to coat and finish with Pecorino. Do not store cooked pasta in the sauce as it absorbs the liquid and goes soft.
FAQs
Do I have to use guanciale? Traditionally yes, and it makes a genuine difference. Guanciale has more fat than pancetta and a specific uncured pork flavour that the dish is built around. Pancetta is the best substitute and gives a very similar result. Bacon works in a pinch but the smoky flavour shifts the dish noticeably away from its Roman character. Worth finding guanciale from an Italian deli if you can.
Can I skip the wine? You can. The wine deglazes the pan and adds background acidity and depth to the sauce. If you’d rather leave it out, add an extra splash of pasta water to deglaze and a small squeeze of lemon juice or a teaspoon of red wine vinegar with the tomatoes to recover some of the acidity. The sauce will be slightly rounder and less layered without it but still very good.
Why use whole canned tomatoes instead of crushed? Whole tomatoes tend to be better quality in most brands, less watery and with more concentrated flavour than pre-crushed. Crushing them yourself during cooking also means you control the final texture. Break them down more for a smoother sauce, less for a chunkier one. With pre-crushed, that texture decision has already been made for you, and the liquid content is usually higher.
What pasta shape works best? Spaghetti is the most common and works very well. Bucatini is the traditional Roman choice: thick, hollow pasta like spaghetti with a hole through the middle, which holds the sauce inside the tube as well as on the outside. Rigatoni is also used in some versions. Avoid very thin pasta like angel hair as it doesn’t have enough body to hold up to the richness of the sauce.