Slice the jalapeños in half, remove the seeds, and dice them into small pieces. Then dice the garlic clove. This ensures the flavors are evenly distributed when blended.

Add the diced jalapeños and garlic from Step 1 to a small bowl. Add the mayonnaise, fresh cilantro, and freshly squeezed lime juice. Gather everything together before blending.

Using an immersion blender, pulse the mixture a few times until completely smooth. Make sure the blender is fully submerged in the bowl to prevent splatter. Blend until the mixture is creamy and the herbs and jalapeños are fully incorporated. I like to scrape down the sides of the bowl once or twice to make sure everything gets evenly blended.

Taste the blended mayonnaise. If you prefer a zestier flavor, add a little more lime juice. For extra heat, blend in more diced jalapeño. Adjust to your liking.

Transfer the prepared mayonnaise to an airtight container or jar and store it in the refrigerator. You can serve it immediately, but for the best flavor, let it sit for at least 30 minutes before using. I find that letting the flavors meld makes a noticeable difference!