Fresh Arugula Rocket Pesto (Herb Sauce Recipe)
This uncooked arugula pesto blends peppery greens, fresh basil, toasted pine nuts, Parmesan, garlic, lemon, and olive oil into about 1 cup of bright herb sauce. Pulse the ingredients briefly, stream in the oil, and stop when combined. Keep the pesto cool, refrigerate it promptly, and serve it with hot pasta off the heat.
When spring and summer bring fresh herbs to the market or garden, a quick sauce can make dinner feel different without adding much work. This one uses arugula, also called rocket, for a lively peppery taste, while basil, Parmesan, lemon, and olive oil round it out.
I make pesto when I want a flexible sauce that needs no cooking and can be made with a food processor, blender, or mortar and pestle. The main trick is simple: dry the greens well and process in short bursts. That helps keep the flavor fresh and the texture thick rather than watery or oily.
Material Setup & Ingredient Preparation
This section covers the ingredients, tools, and simple prep that help the pesto taste fresh and blend evenly. No stove heat is needed for the sauce itself. You will only use a pan if you choose to toast the pine nuts, and those nuts must cool before they meet the greens.
Ingredients for about 1 cup
- 2 cups packed arugula
- 1 cup basil leaves
- ⅓ cup pine nuts, toasted and cooled
- ½ cup finely grated Parmesan
- 1 small garlic clove
- ½ cup extra-virgin olive oil
- 1 tablespoon lemon juice
- Salt, to taste
Rinse the arugula and basil, then dry them very well. A salad spinner helps, but clean towels also work. Water clinging to the leaves can thin the sauce, so take a moment to dry them before blending.
Toast the pine nuts in a dry pan over moderate heat, stirring often until lightly golden. They can darken quickly, so stay close and watch them rather than relying on a fixed time. Let them cool completely before processing.
Set out a food processor or blender, or use a mortar and pestle. Keep the ingredients and equipment cool. There is no need to preheat cookware, an oven, or the processor bowl.
| Ingredient or tool | What it contributes | Preparation note |
|---|---|---|
| Arugula | Peppery, leafy flavor | Wash and dry thoroughly |
| Basil | Sweet, herbal balance | Remove tough stems |
| Pine nuts | Richness and body | Toast, then cool |
| Parmesan | Salty, savory taste | Finely grate for easier mixing |
| Lemon juice | Brightness | Add before the oil |
| Processor or mortar | Chops and combines ingredients | Use without heat |
Next step: Have all ingredients ready before you start. Pesto comes together quickly once processing begins.
Pesto Technique & Emulsion Execution
An emulsion is a mixture of oil and other ingredients that holds together rather than separating at once. This pesto is a rustic emulsion, not a perfectly smooth one. Short pulses and a slow pour of oil help the ingredients combine while limiting heat and excess air.
Food processor or blender method
- Add the garlic and cooled pine nuts to the bowl. Pulse until they form a coarse meal. Scrape down the sides if needed.
- Add the arugula and basil. Pulse in short bursts, stopping to scrape the bowl once or twice. Avoid running the machine continuously.
- Add the Parmesan and lemon juice. Pulse briefly to distribute them.
- With the machine running for a short time, pour in the olive oil in a steady stream. Stop as soon as the ingredients are combined. The pesto should look thick and spoonable.
- Taste and add salt as needed. Parmesan adds saltiness, so start with a small amount.
Prolonged high-speed processing can warm and oxidize the greens. Oxidation means contact with air can change the color and flavor of cut leaves. If the pesto starts to look warm, pause and let the bowl cool before continuing. Do not keep blending in hopes of making it perfectly smooth; a little texture is welcome.
Mortar-and-pestle method
A mortar and pestle crush ingredients by hand, making a coarse sauce without a motor. This method takes more effort but gives you close control over the texture. Start with the garlic and pine nuts, crushing them into a rough paste.
Add the greens in handfuls and work them against the sides of the mortar. Stir in the Parmesan and lemon juice, then gradually mix in the olive oil. Season with salt and taste. The sauce may be less uniform than a machine-made version, but it should still cling to a spoon.
| If the pesto is… | Try this |
|---|---|
| Too thick | Stir in a little more olive oil or pasta water when serving |
| Too loose | Add a small amount of Parmesan or more greens, then pulse briefly |
| Too sharp or peppery | Add more basil or Parmesan to soften the flavor |
| Too mild | Add a little lemon juice, salt, or garlic, then taste again |
| Unevenly mixed | Scrape the bowl and pulse once or twice |
Next step: Stop blending once the sauce is combined. Taste before adding more salt, garlic, or lemon.
Safe Storage, Cleaning & Equipment Care
Because this sauce contains fresh greens, cheese, and raw garlic, treat it as a perishable food. Transfer it to a clean, nonreactive container, refrigerate it promptly at 40°F / 4°C or below, and use it within 4 days. Do not leave fresh garlic mixed with oil at room temperature for extended storage.
Spoon the pesto into the container and press the surface level to reduce air pockets. Seal the container and place it in the refrigerator promptly. If you will not use it within 4 days, freeze it for longer storage. For easier portions later, freeze small amounts in a freezer-safe container or tray, then keep them covered.
To clean the processor, blender, or mortar, scrape out as much pesto as possible first. Wash the parts with warm, soapy water and follow the tool maker’s care instructions. Do not assume every bowl, blade, or container has the same material limits.
This recipe does not use heat on the finished sauce. Olive oil’s smoke point is not relevant here, and there is no need to warm the pesto in a pan. Since the process is cool, cookware thermal limits are not part of the method. Follow manufacturer guidance for any equipment you use.
Next step: Label stored pesto with the date you made it. Refrigerate promptly, and freeze any portion you do not expect to use within 4 days.
Serving, Pairing & Dining Presentation
This pesto is a finishing sauce, not a cooking sauce. Toss it with hot pasta after the pasta has been taken off the heat. The warmth softens the sauce without simmering it, which helps preserve the fresh herb flavor and keeps the oil from separating.
For pasta, reserve a little cooking water before draining. Add pesto to the pasta off the heat, then stir in a spoonful of pasta water if the sauce feels too thick. Add more a little at a time until it coats the noodles. Avoid pouring the pesto into a hot pan or placing it over a simmer.
The sauce also works as a spread for sandwiches or as a spooned topping for cooked vegetables, beans, or eggs. Start with a small amount, taste, and add more if you want a stronger peppery note. A little extra grated Parmesan can finish the dish.
| Serving idea | How to use the pesto |
|---|---|
| Pasta | Toss with hot, drained pasta off the heat; loosen with pasta water |
| Sandwich | Spread a thin layer on bread |
| Cooked vegetables | Spoon over the vegetables just before serving |
| Eggs or beans | Add a small spoonful after cooking |
Next step: Bring the pesto to the table at cool room temperature only for serving, then return leftovers to the refrigerator promptly.
Frequently Asked Questions
These answers cover common questions about the ingredients, texture, storage, and best way to serve arugula pesto. The key points are to keep the sauce uncooked, work in short pulses, and refrigerate leftovers promptly. If you are adjusting the recipe, change one ingredient at a time and taste as you go.
Can I make this pesto without basil?
Yes. You can replace the basil with more arugula, though the result will taste more peppery and less sweet.
Can I use a blender instead of a food processor?
Yes. Use short pulses and stop to scrape down the sides. Avoid prolonged blending, which can warm the greens.
Do I have to toast the pine nuts?
No, but toasting adds a deeper, nutty flavor. If you toast them, let them cool completely before adding them to the greens.
Can I use a different nut?
You can try another nut, but the flavor and texture may change. Toast and cool it first, then add it in the same amount and adjust to taste.
Why is my pesto watery?
Wet greens are a common cause. Dry the leaves thoroughly before processing, and add any pasta water only when serving.
Why did the pesto turn dull or dark?
Long processing can warm and oxidize the chopped greens. Use short pulses, keep ingredients cool, and stop once the sauce is combined.
Can I cook the pesto in a pan?
No. Do not simmer it or add it to a hot pan. Toss it with hot pasta off the heat instead.
How long does homemade arugula pesto last?
Keep it covered in the refrigerator at 40°F / 4°C or below and use it within 4 days. Freeze it for longer storage.
Can I leave pesto with fresh garlic and oil on the counter?
No. Refrigerate it promptly. Fresh garlic mixed with oil should not be kept at room temperature for extended storage.
Can I make the pesto ahead?
Yes. Make it ahead, transfer it to a clean container, and refrigerate promptly. For storage beyond 4 days, freeze it.
(This article was written by one of our staff writers, Steven R. Bancroft. Visit our Meet the Team page.)
