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Avocado Appetizers on Crostini

Here’s a tasty, popular avocado appetizers on crostini to add to your repertoire. We top it with tomatoes and a balsamic drizzle to boost flavor and pizzazz. 

You will love the flavor combination of avocado, lime, tomatoes and balsamic. Simple low-fuss vegetarian appetizers or brunch fare in just 12 minutes.

appetizers with avocado on crostini drizzled with balsamic reduction p

Crostini – “little toasts” in Italian – are a great base for these appetizers. They are semi-crisp with a hint of garlic and easy to manage in one or two bites. 

Mash the avocado with lime, salt and pepper to make a very basic guacamole. Spread the mixture on crostini, then add your tomatoes and drizzle. Serve them on a cutting board, rustic style.

Essentially, this is another avocado toast idea with a few variations to make it your own. Nothing fancy, but very tasty.

3 Tips

  1. Buy ripe avocados (or wait until they ripen) to get a nice creamy avocado mash.
  2. Use a sturdy bread that will hold up well and stay semi crisp.
  3. Only drizzle the balsamic reduction just before serving as it tends to “bleed”.

FAQ for Avocados

How can you tell if an avocado is ripe?

Firstly, check the color. Typically, brown avocados are ripe IF they yield to gentle pressure when squeezed. Bright green avocados are not ripe. Secondly, if there is a nubby stem on the avocado, it will easily break off if it’s ripe – and show a greenish or yellowish color under the stem. 

How can I ripen an avocado at home?

Leave the avocados on the counter at room temperature for 2-3 days. To speed up the ripening process, place them in a paper bag. Do not put whole avocados in the fridge as they won’t ripen. Cut avocados, however, should be stored in the fridge. 

How do I keep my cut avocado from turning brown?

Basically, you have to keep the oxygen from reaching the cut avocado surface. You can do this in one of 3 ways: by squeezing lemon juice over the cut surface; by place the cut surface face down on a flat plate; or by submerging the cut avocado in an airtight container full of clean water. 

For more information about avocados, check out this video on nutrition benefits, tips and preparation

Tailor To Your Taste

Bread options

  • Use a sturdy bread such as multigrain, artisan bread, French baguette or ciabatta.

Substitutes

  • For tomatoes: If you don’t like tomatoes, leave them out or substitute them with chopped roasted red peppers, prosciutto, chopped hard boiled egg, small cooked shrimp or radish slices.
  • For balsamic reduction: Instead, try a sweet chili sauce.

Garnish options

  • Top with chopped fresh basil, green onions or chives. Or mash the herbs into the guacamole avocado mixture.
  • Sprinkle with crumbled goat cheese. 
  • A light sprinkle of flaky sea salt makes a great finish.

Shortcuts

  • Buy ready made guacamole.
  • Buy the Balsamic reduction/glaze. It’s available in most grocery stores and last forever in the cupboard.

Make Ahead 

  • Assemble the avocado appetizers up to 30-60 minutes ahead without the balsamic drizzle. Drizzle the Balsamic reduction just before serving as it tends to bleed into the avocado if it’s not thick enough.

Other easy healthy appetizers you might like

How to make avocado appetizers on crostini

bread slices, avocado, oil, tomatoes, lime, garlic salt and pepper
Ingredients: bread slices, avocado, oil, tomatoes, lime, garlic salt and pepper
mashed avocado with lime salt pepper in bowl
Mash avocado flesh in a bowl with lime juice, salt and pepper.
toasted bread on cutting board
Toast bread slices. If using larger slices, you will later cut them into pieces later. Brush both sides of toast with olive oil. Then rub a half piece of garlic over each toast.
cut up toast spread with avocado and tomatoes on cutting board
Spread avocado mixture over each slice of toasted bread and top with tomato pieces. Cut toast into bite size crostini if you are using larger bread slices.
appetizers with avocado on crostini drizzled with balsamic reduction-3
Avocado Crostini with Balsamic Drizzle on cutting board
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5 from 7 votes

Avocado Appetizers on Crostini

Here's a tasty, popular avocado appetizer on crostini to add to your repertoire. We top it with tomatoes and a balsamic drizzle to boost flavor and pizzazz. Just 12 minutes.
Total Time12 mins
Course: Appetizer
Cuisine: American, Vegetarian
Servings: 16 pieces/apps

Ingredients

  • 1/2 baguette, Note 1
  • 1-2 tablespoons olive oil
  • 1 garlic clove, cut in half
  • 1 medium-large ripe avocado (or 2 small ones)
  • 1 lime
  • kosher salt and pepper to taste
  • 12 cherry tomatoes, cut in 4 (or heirloom chopped)
  • balsamic reduction/glaze (store bought), Note 4

Garnish options (optional)

  • chopped fresh basil or other herbs, crumbled goat cheese, sprinkle of sea salt or lime/lemon zest.

Instructions

  • MAKE THE CROSTINI: Cut 16 slices of baguette sized bread about 1/4-1/2 inch (0.7-1.2cm) thick (or 4-5 slices of larger bread that you will cut in thirds or quarters). Toast slices in toaster or toaster oven until golden brown. (Alternatively grill bread for a minute per side or bake at 375F/190C for about 8 minutes). Bread should be fairly crisp. Brush with olive oil on both sides using pastry brush. Then rub one side of bread with the cut half of a garlic clove.
  • MAKE THE AVOCADO MASH (Guacamole): Cut avocado in half. Remove the pit. Scoop out the avocado into a small bowl with a spoon, discarding the skin. Squeeze in juice of half or three-quarters of a lime and sprinkle with 1/4 teaspoon salt. Mash, taste and add more lime, salt and pepper as needed.
  • ASSEMBLE: Place crostini on a serving platter or wooden cutting board. Divide avocado evenly over crostini and spread. Place a few cherry tomato halves on top. Cut toast slices in bite size pieces if you used larger bread slices. Just before serving, drizzle with Balsamic reduction/glaze. Try a zig zag pattern, drizzling balsamic over crostini and onto platter for a nice presentation.

Notes

  1. Bread options: Use a sturdy bread such as multigrain, artisan bread, French baguette or ciabatta.
  2. Shortcuts: buy ready made guacamole and Balsamic reduction/glaze
  3. Variations
    • If you don’t like tomatoes, leave them out or substitute with chopped roasted red peppers, prosciutto, chopped hard boiled egg, shrimp or radishes.
    • Instead of balsamic reduction, try a sweet chili sauce or sweet-tart salad dressing drizzle. 
  4. To make your own Balsamic Glaze/Reduction. I usually buy it, but it’s easy to make your own if you prefer. Bring to boil a half cup of balsamic vinegar and two tablespoons honey or brown sugar. Reduce heat to a simmer and simmer for about 15 minutes until it reduces by half to a syrup consistency (thick enough to coat the back of a spoon).
  5. Make Ahead: Prepare all the components ahead. Assembly can be done up to 30-60 minutes ahead, but I suggest drizzling the Balsamic reduction just before serving as it tends to bleed into the avocado.
 
Nutrition values are estimates. 

Nutrition

Nutrition Facts
Avocado Appetizers on Crostini
Amount Per Serving
Calories 53 Calories from Fat 27
% Daily Value*
Fat 3g5%
Saturated Fat 1g6%
Sodium 123mg5%
Potassium 102mg3%
Carbohydrates 6g2%
Fiber 1g4%
Sugar 1g1%
Protein 1g2%
Vitamin A 94IU2%
Vitamin C 5mg6%
Calcium 10mg1%
Iron 1mg6%
* Percent Daily Values are based on a 2000 calorie diet.
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Avocado appetizers on crostini has been republished from 2017 with new information and images.

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