Avocado Lime Marinade For Grilled Vegetables

Name: Avocado Lime Marinade For Grilled Vegetables
Prep time: 10 min
Total time: 10 min
Yield: 4 servings
Cuisine: Mexican
Ingredients: 2 medium (300 g) ripe avocados, pit removed, flesh scooped out; ¼ cup (60 ml) fresh lime juice, freshly squeezed (about 2 medium limes); ½ cup (15 g) fresh cilantro, leaves only, loosely packed, roughly chopped; 1 medium (26 g) fresh jalapeño, seeded and minced (remove seeds and white membrane for less heat; keep them for more spice); 2 cloves (6 g) garlic cloves, minced; 3 tablespoons (45 ml) extra-virgin olive oil; ½ teaspoon (3 g) kosher salt; ¼ teaspoon (½ g) black pepper, freshly ground; ¼ teaspoon (½ g) ground cumin (optional); 2 lbs (900 g) assorted vegetables for grilling (such as bell peppers, zucchini, eggplant, cherry tomatoes, and red onion), cut into 1 1/2-inch (4 cm) pieces, uniform in size (optional)

From the MyKitchenBank Kitchen

A vibrant, creamy marinade inspired by Latin American flavors, made from ripe avocado, fresh lime, cilantro, and jalapeño. The avocado creates a rich, clinging coating that won't drip off vegetables on the grill, while lime juice keeps it bright and fresh. Jalapeño adds gentle heat, and cumin echoes warm, toasted notes. Use it immediately or let vegetables marinate for up to 2 hours for deeper flavor absorption. This is a no-cook marinade that takes just 10 minutes to prepare.

Prep: 10 min
Cook: —
Wait: 30 min
Total: 40 min
Makes: About 1 1/2 cups marinade (for 2 lbs vegetables, serving 4)

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Ingredients

4 servings

For the Marinade
2 medium (300 g) ripe avocados, pit removed, flesh scooped out
¼ cup (60 ml) fresh lime juice, freshly squeezed (about 2 medium limes)
½ cup (15 g) fresh cilantro, leaves only, loosely packed, roughly chopped
1 medium (26 g) fresh jalapeño, seeded and minced (remove seeds and white membrane for less heat; keep them for more spice)
2 cloves (6 g) garlic cloves, minced
3 tablespoons (45 ml) extra-virgin olive oil
½ teaspoon (3 g) kosher salt
¼ teaspoon (0.5 g) black pepper, freshly ground
¼ teaspoon (0.5 g) ground cumin (optional)
For Marinating
2 lbs (900 g) assorted vegetables for grilling (such as bell peppers, zucchini, eggplant, cherry tomatoes, and red onion), cut into 1 1/2-inch (4 cm) pieces, uniform in size (optional)

Equipment (5)

Medium bowl
Cutting board
Chef's knife
Fork or spoon for mashing
Large shallow dish or gallon-sized zip-top bag for marinating

Steps

Before you start

Choose ripe but not overripe avocados (they should yield gently to pressure but not feel mushy)
Squeeze fresh lime juice if possible; bottled lemon or lime juice will work but fresh is brighter
Prep your vegetables before making the marinade so they're ready to coat immediately
The marinade is best used fresh or within 2–3 hours; avocado will brown if left longer, though flavor remains good

1
Prep the Aromatics
- Mince the 2 garlic cloves finely.
- Remove the seeds and white membrane from the jalapeño (this reduces heat; keep them if you prefer a spicier marinade), then mince the flesh into small pieces.
- Roughly chop the cilantro leaves, using mostly the leaves with just some tender stem pieces.
- Set these aside on your cutting board.
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Ready when: All aromatics are minced to consistent small pieces
Tip: Work quickly once the jalapeño is cut to preserve the volatile oils that give it flavor; wash your hands well or wear gloves to avoid jalapeño oils irritating your eyes later
2
Mash the Avocado
- Halve each avocado lengthwise and remove the pit by striking it with the flat of your knife, twisting, and lifting it out.
- Scoop the flesh into a medium bowl (you'll have roughly 1 1/2 cups of flesh).
- Pour in the 1/4 cup of fresh lime juice immediately and begin mashing with a fork.
- Mash to your preferred consistency—I like it slightly chunky with some creamy texture, so you can still see small lumps of avocado throughout, not completely smooth.
- The lime juice prevents browning and adds brightness.
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Ready when: Avocado is mashed to a slightly chunky, creamy consistency with lime juice fully incorporated
Tip: Work quickly and use the lime juice immediately to prevent the avocado from oxidizing and browning; don't over-mash into a smooth purée
3
Build the Marinade
- Add the minced garlic, jalapeño, and cilantro to the mashed avocado.
- Drizzle in the 3 tablespoons of olive oil.
- Sprinkle in the 1/2 teaspoon salt, 1/4 teaspoon black pepper, and the cumin if using.
- Fold gently with a spoon or fork to combine everything evenly, being careful not to over-mix, which would make the marinade too smooth and homogeneous.
- Taste and adjust seasoning: add a pinch more salt, pepper, lime juice, or cilantro as needed.
- The finished marinade should smell bright, herbal, and inviting.
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Ready when: All ingredients are evenly combined with visible avocado pieces throughout; aroma is fragrant and well-seasoned
Tip: Avoid using a food processor or blender, which will over-work the avocado, make it bitter, and result in a texture that's too smooth and uniform for coating vegetables
4
Prepare the Vegetables
- Cut your chosen vegetables into roughly 1 1/2-inch (4 cm) pieces.
- For bell peppers: remove the core and seeds, then chunk the flesh.
- For zucchini: slice into 1/4-inch thick rounds or half-moons.
- For eggplant: cube into 1-inch pieces.
- For cherry tomatoes: halve if large, leave whole if small.
- For red onion: cut into chunks, separating the layers so pieces don't clump together.
- Aim for uniform, similar sizes so the vegetables cook evenly on the grill.
- You'll need about 4–6 cups of mixed vegetables, roughly 2 pounds (900 g) total.
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Ready when: All vegetables cut to uniform 1 1/2-inch pieces and ready to coat
Tip: Uniform sizes ensure even cooking on the grill; avoid cutting some pieces much larger or smaller than others, which leads to uneven char and texture
5
Coat the Vegetables
- Transfer the cut vegetables to a large shallow dish or a gallon-sized zip-top bag.
- Pour the entire avocado-lime marinade over the vegetables.
- Using tongs or clean hands, toss gently but thoroughly to coat every piece evenly.
- Make sure the creamy marinade reaches all surfaces—undersides, crevices, and corners of the vegetable pieces.
- If using a zip-top bag, seal carefully and shake gently to distribute the marinade and release any air pockets.
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Ready when: All vegetables are evenly coated in green marinade with no dry pieces visible
Tip: Use a zip-top bag for easier cleanup and compact storage, or a shallow dish if you prefer to see and stir the vegetables easily
6
Marinate and Rest
- Let the vegetables sit at room temperature for at least 30 minutes before grilling.
- This allows the flavors to penetrate the vegetables and the avocado-based marinade to cling evenly to every surface.
- For deeper, richer flavor absorption, marinate for up to 2 hours.
- If marinating longer than 1 hour, cover and move to the refrigerator; remove from the refrigerator and let sit at room temperature for 15–20 minutes before grilling to ensure even temperature throughout.
- Stir or shake the dish occasionally if marinating for extended time to redistribute the marinade and ensure all pieces stay coated.
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Ready when: Vegetables have absorbed the marinade and are fragrant; marinade has darkened slightly and clings to vegetables
Tip: The marinade is best used fresh or within 2–3 hours; avocado will brown if left exposed longer, though the flavor will still be good. If preparing ahead, keep the coated vegetables refrigerated and bring to room temperature before grilling

Good to know

Tips

Never over-mix the avocado once it's mashed, and absolutely avoid using a food processor or blender. Over-working avocado makes it bitter and releases a compound that tastes unpleasant. Hand-mashing preserves the bright, creamy texture you want.
If your avocados are very soft or you're making this more than 1–2 hours ahead, keep the finished marinade covered and refrigerated to slow browning. Lime juice slows oxidation, but it won't prevent it entirely.
Uniform vegetable sizes are critical for even grilling. Vegetables that are too large will char on the outside before the inside softens; tiny pieces will burn.
This marinade works beautifully on vegetables but also clings well to firm tofu, thick-cut portobello mushrooms, or even cauliflower steaks. Apply the same marinating time and grill as you would vegetables.

Make ahead

Yes. The finished marinade can be made up to 2 hours ahead and held at room temperature, though the avocado will darken slightly. Alternatively, vegetables can be marinated up to 24 hours ahead; refrigerate them and bring to room temperature 15–20 minutes before grilling.

Storage & reheating

The finished marinade keeps in an airtight container in the refrigerator for 2–3 days, though the avocado will brown over time (flavor is still good). Marinated vegetables keep refrigerated in a covered dish or zip-top bag for up to 24 hours. Once grilled, store leftover coated vegetables in an airtight container in the refrigerator for up to 3 days; reheat gently on the grill or in a 350°F (175°C) oven for 5–7 minutes if desired.

Substitutions

fresh cilantro → fresh parsley or fresh basil. Parsley is more mild; basil shifts the flavor toward Italian. You'll lose the cilantro's characteristic brightness, so adjust lime juice or add a squeeze more.
fresh jalapeño → serrano pepper (more heat) or omit entirely for a mild, creamy marinade. Serrano is significantly hotter; use only half a pepper. Omitting adds creaminess without spice.
fresh lime juice → fresh lemon juice. Lemon is slightly less bright and more tart; use the same amount. The finished marinade will be more muted in flavor.
ground cumin → smoked paprika or dried oregano. Smoked paprika adds depth and smokiness; oregano brings Mediterranean notes. Use the same amount but taste as you go—oregano can be strong.