Slice each jalapeño in half lengthwise and use a small spoon or the tip of a paring knife to scrape out the seeds and the white membrane. Place the seeds in a small separate bowl and set aside — do not discard them. The deseeded jalapeños provide the green, slightly vegetal, moderately warm heat that defines zhoug's character without tipping into aggressive spice. The reserved seeds become your heat calibration tool in the tasting step: adding a small amount back into the processor gives you precise, incremental control over the final heat level in a way that adding additional jalapeño pieces cannot. Having the seeds available also means that if two members of a household prefer different heat levels, the zhoug can be split from the processor at the baseline level and additional seeds added to one portion only. Cut the deseeded jalapeño halves into roughly 3–4cm pieces — large enough to process efficiently but small enough to distribute evenly through the finished sauce without any one piece remaining intact.

Smash the three garlic cloves with the flat side of a knife — a single firm press that cracks each clove open without fully flattening it. Smashing rather than mincing is the correct preparation for this application: smashed garlic releases its aromatic compounds into the surrounding ingredients during processing and produces a more even, integrated garlic presence than whole cloves, while being less likely to create concentrated sharp garlic pockets than finely minced garlic. Wash the cilantro thoroughly under cold running water and shake dry — the stems are included intentionally and completely. Cilantro stems, particularly the thinner upper stems attached to the leaves, contain essentially the same volatile aromatic compounds as the leaves and add intensity to the sauce's herbaceous character without any textural downside in a blended preparation. Only the very lowest, thickest hollow stems of the bunch should be discarded. Zest the half lime before juicing it — the zest is always taken from the outer green layer only, not the white pith beneath which is bitter. A Microplane or fine grater produces the cleanest zest without taking the bitter pith.

Add all the prepared ingredients to the food processor in the following order: jalapeño pieces, smashed garlic, cilantro with stems, mint leaves, ground cumin, ground coriander, lime juice, lime zest, and olive oil. The order is not critical for the flavour of the finished sauce but loading the harder ingredients — jalapeño and garlic — at the bottom of the processor ensures they are in contact with the blade from the first pulse, while the delicate herbs on top are processed by the blade as it works through the harder ingredients below. Begin processing using the pulse technique — 5 seconds on, 2 seconds off, repeating the cycle. This pulse approach is the single most important technique decision in the recipe. Continuous blending at high speed produces a smooth, homogeneous green liquid — effectively a green herb oil without textural character. Pulsing allows you to assess the texture after each cycle and stop the moment the sauce reaches the correct consistency: smooth overall with small, distinct pieces of herb and jalapeño still visible at the surface, and a body that is thick enough to mound slightly rather than pooling flat. After approximately 6–8 pulse cycles, check the consistency by stopping the processor and examining the texture. If it is already at the correct slightly coarse, pesto-like consistency, stop. If it still has large visible pieces, continue pulsing 2–3 more cycles and check again. If the sauce is too thick to move freely in the processor, add additional olive oil one tablespoon at a time and pulse briefly after each addition until it reaches a pourable consistency.

Remove the lid and taste the zhoug carefully. The calibration of this sauce is straightforward but important: evaluate heat, acidity, and salt as three independent dimensions. Heat: if the deseeded jalapeño baseline is too mild for your preference, add a small pinch of the reserved seeds to the processor and pulse twice, taste again, and repeat until the heat level is right. The seeds contain the concentrated capsaicin of the jalapeño and a small quantity makes a perceptible difference — add conservatively and taste between additions. Acidity: if the sauce tastes heavy or the citrus brightness is not clearly present, add an additional squeeze of lime juice — the freshness of the lime is what makes zhoug feel alive rather than simply herby. Salt: if the sauce tastes flat or one-dimensional despite having all ingredients present, it needs more salt — add in small pinches, process briefly, and taste after each addition. A note on cumin: the ground cumin's earthy warmth takes a few minutes after blending to fully bloom in the olive oil — do not add more cumin immediately if it is not yet prominent. Allow the sauce to rest for 5 minutes, then taste again and the cumin's presence will have deepened noticeably.

Transfer the zhoug to a serving bowl. Zhoug does not require a garnish — its vivid deep green colour from the blended herbs is the visual statement, and adding additional garnish competes with rather than complements it. Serve immediately for the freshest possible herb character, or rest for 5–10 minutes to allow the flavours to integrate. The sauce is at its most herbaceously vivid within the first hour of making.