How Much Pesto To Add To Pasta?
Short answer
If serving as a simple pasta dish, we recommend 50 grams of pesto per person, but our accountant recommends more.
Long answer
In Italy, chefs use just enough pesto to coat the pasta and never allow the dish to drown in the sauce. As a rough guide, your pesto should weigh about 2/3 the weight of the dried pasta you are cooking. So, for a standard single serving of 75g of dried pasta, 50g of pesto is about right.
Naturally, everyone's tastes are different, so you'll have to adjust the quantities up or down depending on who you are cooking for. It also greatly depends on what other ingredients you are serving your pasta with. For example, if you're making a dish with chunks of chicken breast, you'll want to add a little more pesto to ensure the meat is as well coated as the pasta.
Bear in mind that you will (or we at least hope you will) be adding some extra liquid to your sauce in the form of some of the starchy water that the pasta cooked in.
This water is not only incredibly flavourful but also acts as an emulsifier and thickener, enabling you to create a silky, luxuriously smooth, restaurant-quality sauce. It also helps your jar of pesto go a little bit further.
Approximate pesto-to-pasta ratio in grams
Note: 190g is the standard size jar for pesto in the UK, perfect for feeding four adults. Likewise, for a standard 500g bag of dried pasta, we recommend using about 335g of pesto.
| Servings | Dried pasta | Pesto |
| 1 | 75g | 50g |
| 2 | 150g | 100g |
| 3 | 225g | 150g |
| 4 | 300g | 200g |
| 5 | 375g | 250g |
| 6 | 450g | 300g |
| 7 | 525g | 350g |
| 8 | 600g | 400g |
| 9 | 675g | 450g |
| 10 | 750g | 500g |
Approximate pesto-to-pasta ratio in pounds and ounces
|
Servings
|
Dried pasta | Pesto |
| 1 | 2 oz | 1.3 oz |
| 2 | 4 oz | 2.6 oz |
| 3 | 6 oz | 4 oz |
| 4 | 8 oz | 5.4 oz |
| 5 | 10 oz | 6.6 oz |
| 6 | 12 oz | 8 oz |
| 7 | 14 oz | 9.3 oz |
| 8 | 16 oz (1lb) | 10.6 oz |
| 9 | 18 oz | 11.9 oz |
| 10 | 20 oz | 13.2 oz |
A note on using spoon or cup sizes to measure pesto and pasta
We have purposely omitted a chart showing recommended cup sizes for two key reasons. Firstly, shapes that don't fit into a regular cup (e.g. spaghetti) simply can't be measured in the usual way. Secondly, tiny, compact pasta shapes like orzo can weigh up to twice as much as cylindrical shapes like penne, where much of the physical space is taken up by pockets of air. It's far better to use digital kitchen scales and the metric system as we explain in our article about the right amount of pasta per person.