Lobster Avocado Crostini with Black Garlic Butter – a show-stopping appetizer of crispy toast layered with creamy avocado, succulent lobster, and a drizzle of umami rich black garlic butter.
There are appetizers that politely show up on a platter and blend into the background; safe, dependable, quietly doing their job. And then there are appetizers like Lobster Avocado Crostini with Black Garlic Butter. These little toasts don’t just enter the room; they make an entrance. They strut in wearing sequins, whisper something scandalous, and leave you wondering why you’ve wasted your life on greasy chips and onion dip.
The first time I made these, it wasn’t part of some grand culinary plan. Honestly, it was a clean-out-the-fridge kinda day combined with making some avocado recipes. I had a little leftover lobster (this is not a common problem, trust me), a few slices of baguette, and several ripe avocados. I toasted the bread, mashed an avocado, and piled on the lobster. Pretty good, but not earth-shattering.
Then I dredged it through some freshly made black garlic butter that I prepared for another recipe.
I was beyond BLOWN away.
The sweet, almost molasses-y depth of the black garlic hit the creamy avocado and the briny lobster like a mic drop. Suddenly this wasn’t “use-up-the-leftovers crostini.” It was a full-on, call-your-friends, grab-a-glass-of-bubbly, why-haven’t-I-been-making-this-all-along situation. I knew I would be remiss if I didn’t share this.
You don’t need a crazy amount of lobster; I bought two 3 oz. tails and it was plenty for an entire baguette. If you think about how high beef has gone up, not to mention how high all groceries are, it’s not that much of a splurge.
What Is Lobster Avocado Crostini with Black Garlic Butter?
I was recently selected to compete in an Avocados from Mexico contest from Chef’s Roll, and this is one of my recipes. I made a few others, but this one is by far my very favorite. Before I even actually tasted it I had a deep feeling it would be delicious.
This particular contest called for three recipes using avocados, and this is the first one that experimented with. I didn’t even have to make this a second time for taste or ingredients, but just to make sure my measurements were ok, and it was exactly as delicious as the first time.
How Do You Make Lobster Avocado Crostini?
Let’s break it down:
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The bread. Slice your baguette on the bias for more surface area (aka more room for toppings). Brush with olive oil, toast until golden, and for bonus points, rub with a cut clove of garlic as soon as they come out of the oven.
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The avocado. Feel free to keep it simple. A little lime juice, pinch of salt, maybe a drizzle of olive oil. If you want a full guacamole situation, go right ahead. It only enhances the taste, and if you’re a guacamolian you’ll end of eating it anyway. You want the avocado smooth enough to spread, chunky enough to feel fresh.
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The lobster. Claw and knuckle meat are the sweet spot, literally. Warm it gently in a skillet with a pat of butter, or let it come to room temp so it doesn’t seize up your avocado with a cold shock.
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The black garlic butter. Melt it, drizzle it, love it. Black garlic is much softer than regular garlic, so it’s a cinch to work with. I usually whisk mashed black garlic into softened butter with a dash of lemon juice and a sprinkle of flaky salt. It keeps in the fridge for a week, and the flavor deepens every day.
When I first considered lobster and avocado (or guacamole), I really wondered whether or not it would work, mainly because of the texture, but that wasn’t an issue at all.
Let’s talk about the black garlic. If you’ve never had it, you HAVE to try it, especially if you’re a garlic lover like I am. It’s one of my very favorite new things. It smells like heaven, but looks and feels like soft tar. On the outside, it looks like garlic but with dark skin. It’s like garlic that went to the dark side of the pantry and got wiser. It’s garlic, but a little sweet, a little molasses-y, and savory without the harsh bite. It’s unreal off the charts on the delicious scale.
Why This Works:
✤ Texture contrast. Crunchy crostini vs. pillowy avocado vs. tender lobster. That’s the mechanical part of the seduction.
✤ Fat + umami. Avocado is the creamy fat; lobster is the sweet, briny meat; black garlic butter is the deep, almost caramelized umami that ties everything together.
✤ Looks like a million bucks, cooks like a weekday hero. This is an elegant showpiece that doesn’t require a second mortgage or a culinary degree.
Why You Need These in Your Life
1. They look way fancier than they are.
People will assume you hired catering. The truth? You sliced a baguette, mashed an avocado, and opened a bottle of wine while the crostini toasted. Let them live in the fantasy.
2. Texture perfection.
Crunchy base. Creamy avocado. Tender lobster. Glossy drizzle. If your mouth isn’t already watering, check your pulse.
3. Black garlic butter.
This is the not-so-secret weapon. This is garlic that’s been aged low and slow until it turns sticky, sweet, and rich with umami. Think balsamic, molasses, roasted garlic, and a little soy sauce had a love child. Whipped into butter, it becomes the kind of thing you want to slather on… well, everything.
Entertaining Tips (aka How to Look Effortless While Secretly Being a Genius)
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Make ahead, but not too far ahead. Toast the crostini in advance and store in an airtight container. Smash the avocado right before serving so it doesn’t brown.
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Serve warm-ish. Room-temp lobster is fine, but if you want swoons, serve the crostini while the bread is still a little warm and the butter is glossy.
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Pair with bubbles. A dry sparkling wine or Champagne is the move. The acidity cuts through the richness, and let’s be honest – lobster and bubbles just belong together.
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Keep portions small. These are meant to be bites, not meals. You want your guests to reach for a second, maybe a third, not unhinge their jaw like a python to eat one.
These Lobster Avocado Crostini with Black Garlic Butter aren’t just another appetizer. They’re the appetizer. The one people remember long after the party, the one you end up texting recipes for the next day, the one that makes you feel like the person who always has their life together (even if you definitely don’t).
Serving Suggestions Beyond the Party Tray
Sure, these crostini are perfect for parties, but don’t limit yourself:
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Date night in. A bottle of wine, a tray of these, and you’ve basically recreated a restaurant appetizer course without the markup.
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Holiday show-off. Christmas Eve, New Year’s Eve, Valentine’s Day – these belong on your menu.
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Treat yourself Tuesday. Sometimes you just need a fancy snack because you survived the day. No shame.
Put these on your menu for this weekend, if not today.
Here’s your printable –
Lobster Avocado Crostini
Lobster Avocado Crostini with Black Garlic Butter are a show-stopping appetizer - crispy toasts layered with creamy avocado, succulent lobster, and a drizzle of rich black garlic butter.
Ingredients
- 4 oz. lobster tail, deshelled and chopped, reserve 1/4 cup for topping crostini.*
- 2 avocados
- 1 small onion, diced small
- 1 cup grape tomatoes, diced small
- 2 limes, juiced
- 1-2 jalapeños, depending on your heat tolerance, deseeded and diced small
- Handful fresh Cilantro, chopped
- ¼ tsp. kosher salt
- 1 crusty French baguette, sliced
- 2 black garlic cloves, peeled
- 4 tbsp. salted butter
Instructions
- Boil lobster tail for 3-5 min, until shell is completely red. Cool; remove from shell
and chop. - Make guacamole; mash together avocado through cilantro, salt and
squeeze lime, taste and add more if needed. - Make garlic butter by melting butter and garlic in microwave for 30 seconds
on 50% power, adding 10 seconds at a time until melted. Whisk gently. - Build crostini by putting a tsp of guacamole on first, add lobster then drizzle with melted butter.
Notes
*This is the ratio of lobster to avocado that worked for me; You may find that you need more or maybe even less.
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Nutrition Information:
Yield: 4 Serving Size: 3 crostiniAmount Per Serving: Calories: 647Total Fat: 35gSaturated Fat: 11gTrans Fat: 0gUnsaturated Fat: 21gCholesterol: 69mgSodium: 821mgCarbohydrates: 65gFiber: 11gSugar: 8gProtein: 24g
The provided nutrition calculated may not always be accurate.
This was originally published on August 12th, 2020 and updated on September 23rd, 2025.
