Chicken Avocado Sandwich is the kind of lunch that hits every note: creamy, bright, a little crunchy, and wildly satisfying. Whether you’re packing it for work, enjoying it at a sunny picnic, or making a simple weeknight dinner, this sandwich is reliably delicious and easy to put together. This recipe uses shredded or finely diced cooked chicken mixed with ripe avocado, crisp celery, and a zingy mayo-Dijon dressing for a combo that’s cool, flavorful, and endlessly adaptable.

Why you’ll love this sandwich

It’s quick to make, uses pantry-friendly ingredients, and keeps well for a day in the fridge. The avocado brings silkiness without making the filling heavy, while the lemon and Dijon add lift. Finely diced red onion and celery provide just the right amount of crunch. In short: simple ingredients that taste fresh and totally satisfying between your favorite bread or a bed of greens.

Ingredients

2 cups finely diced cooked chicken — see note 1
1/4 cup finely diced celery (1 rib)
1/4 cup finely diced red onion
2 tablespoons finely chopped fresh parsley or cilantro
1 large ripe avocado, divided — see note 2
1 tablespoon lemon juice
1/3 cup mayo, plus more as needed
1 teaspoon Dijon-style mustard
1 teaspoon olive oil
1/4 teaspoon garlic powder
Salt and pepper, to taste

Notes

Note 1: Use cooked chicken that you trust — leftover roasted, poached, or baked chicken breast all work beautifully. Finely dice or shred it so every bite is balanced.

Note 2: The avocado is divided: part is mashed into the dressing for creaminess and part is diced into the filling for fresh texture and visual appeal. Choose an avocado that yields slightly to gentle pressure for best results.

Equipment

Mixing bowl
Fork or potato masher
Cutting board and knife
Spoon and measuring spoons
Bread of choice or sandwich rolls

Step-by-step instructions

The following rewritten steps are clear, practical, and follow the ingredient amounts precisely. Read through once before starting so you can work efficiently.

Prepare the avocado: Cut the large ripe avocado in half and remove the pit. Scoop out roughly half of the avocado and place it in a small bowl. Reserve the remaining half for dicing into the chicken mixture later.
Mash the avocado: Use a fork or small masher to mash the reserved avocado half until mostly smooth. Stir in the lemon juice immediately to preserve color and add brightness.
Make the dressing base: Into the mashed avocado, add 1/3 cup mayo, 1 teaspoon Dijon-style mustard, 1 teaspoon olive oil, and 1/4 teaspoon garlic powder. Whisk or stir until well combined and creamy. Taste and add salt and pepper to your preference.
Prepare the chicken and vegetables: In a separate mixing bowl, place 2 cups finely diced cooked chicken. Add 1/4 cup finely diced celery (from 1 rib), 1/4 cup finely diced red onion, and 2 tablespoons finely chopped fresh parsley or cilantro. Stir these ingredients together to distribute them evenly.
Add diced avocado to the chicken: Dice the remaining half of the ripe avocado into small cubes and gently fold them into the chicken and vegetable mixture. Be gentle so the avocado keeps some texture and doesn’t completely break down.
Combine with the dressing: Pour the mashed avocado and mayo dressing over the chicken, celery, red onion, and herb mixture. Gently fold everything together until the chicken is evenly coated. If the mixture seems dry, add a little more mayo, one teaspoon at a time, until you reach the desired creaminess.
Adjust seasoning: Taste the filling and add more salt, pepper, or lemon juice as needed. Adjust the garlic powder or Dijon if you want more bite. The goal is a balanced mixture with creamy, tangy, and savory notes.
Assemble the sandwiches: Toast your bread or sandwich rolls if desired. Spoon a generous portion of the chicken-avocado mix onto the bottom slice of bread, then top with your preferred sandwich toppings—lettuce, tomato slices, or extra herbs—followed by the top slice of bread.
Serve or store: Serve immediately, or refrigerate the filling in an airtight container for up to 24 hours. Assemble sandwiches just before serving to preserve bread texture. If packing for later, keep the filling chilled and assemble close to mealtime.

Serving suggestions

This Chicken Avocado Sandwich is versatile. Serve it:

On toasted sourdough with crisp romaine and ripe tomato slices.
On whole-grain bread with a sprinkle of lemon zest for extra brightness.
In a wrap with baby spinach and shredded carrot for a lighter roll-up.
Over a bed of mixed greens as a salad—skip the bread and use the same filling for a crunchy, creamy chicken avocado salad.

Make-ahead and storage tips

Prepare the chicken avocado filling up to a day in advance. Store it in an airtight container in the refrigerator. When storing, press a piece of plastic wrap directly on the surface of the filling to help minimize browning of the avocado. If the filling seems a bit thick after chilling, stir in a teaspoon or two of mayo or a splash of olive oil to loosen it before assembling sandwiches.

Variations and add-ins

If you want to customize, here are a few simple swaps and extras that work well:

Spice it up: Add a pinch of cayenne or a tablespoon of finely chopped pickled jalapeño for heat.
Extra crunch: Fold in toasted sunflower seeds or chopped toasted walnuts.
Herb swap: Use basil instead of parsley or cilantro for a sweeter herbal note.
Swap the mayo: For a lighter version, use a yogurt-mayo blend, keeping the overall mayo amount the same for texture.

Why the ingredients matter

Each item in this recipe plays a role. The diced cooked chicken is the protein backbone and should be tender and moist. Celery and red onion give a clean crunch and a little sharpness, respectively, which prevents the sandwich from becoming too rich. The mashed avocado folded with mayo creates a luscious binder that still feels fresh thanks to the lemon juice. Dijon adds a subtle tang and depth, while olive oil and garlic powder round out the savory notes.

FAQ

Can I use rotisserie chicken? Yes—rotisserie chicken works perfectly. Just remove the skin and finely dice the meat to match the texture called for in the recipe.

How do I prevent the avocado from browning? Acid helps: toss mashed avocado with lemon juice immediately and store the finished filling with plastic wrap pressed directly to the surface. Assemble sandwiches shortly before serving for best color and texture.

Can I use less mayo? You can reduce the mayo slightly, but the recipe relies on the 1/3 cup plus more as needed to create a creamy binder. If you prefer less mayo, replace some of it with plain yogurt while keeping the total volume similar to maintain texture.

Approximate nutrition (per sandwich, depending on bread and portion)

Nutrition will vary by ingredients and portion size, but this sandwich generally delivers a satisfying balance of protein from the chicken, healthy fats from the avocado and olive oil, and fiber from the vegetables and bread. For a lighter option, serve the filling over leafy greens.

Final thoughts

The Chicken Avocado Sandwich is one of those easy recipes that always delivers: fresh, simple, and flexible. It’s perfect for using up leftover cooked chicken, and the combination of creamy avocado and tangy mayo-Dijon dressing keeps the flavors bright. With just a handful of ingredients and straightforward steps, you’ll have a lunch you look forward to eating—every time.

Recipe recap

Ingredients: 2 cups finely diced cooked chicken; 1/4 cup finely diced celery (1 rib); 1/4 cup finely diced red onion; 2 tablespoons finely chopped fresh parsley or cilantro; 1 large ripe avocado, divided; 1 tablespoon lemon juice; 1/3 cup mayo, plus more as needed; 1 teaspoon Dijon-style mustard; 1 teaspoon olive oil; 1/4 teaspoon garlic powder; salt and pepper.

Directions (brief): Mash half an avocado with lemon juice, mayo, Dijon, olive oil, and garlic powder. Combine diced chicken, celery, red onion, and herbs in a bowl. Dice remaining avocado and fold into chicken mixture. Stir in the mashed avocado dressing until combined. Season, assemble on toast or rolls, and serve.

Enjoy your Chicken Avocado Sandwich—a reliable, crowd-pleasing classic that’s easy to make and full of fresh flavor.

Chicken Avocado Sandwich

A creamy, quick chicken and avocado sandwich filling perfect for toasted bread, wraps, or pita.

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Prep Time 20

Total Time 20

Servings: 4 servings

Ingredients Equipment Method Notes

Ingredients

2 cups finely diced cooked chicken see note 1
1/4 cup finely diced celery about 1 rib
1/4 cup finely diced red onion
2 tablespoons finely chopped fresh parsley or cilantro
1 large ripe avocado divided (3 Tbsp mashed for dressing, remaining diced)
1 tablespoon lemon juice
1/3 cup mayonnaise plus more as needed (1–4 tablespoons)
1 teaspoon Dijon-style mustard
1 teaspoon olive oil
1/4 teaspoon garlic powder
salt and pepper to taste (suggested 1/4 tsp each)

Equipment

Large Bowl
Fork or potato masher
Knife
Cutting Board

Method

Halve and pit the avocado. Mash 3 tablespoons of the avocado in a large bowl until mostly smooth to form the dressing base.
Add lemon juice, mayonnaise, Dijon mustard, olive oil, garlic powder, and a pinch of salt and pepper to the mashed avocado; whisk until combined.
Dice the remaining avocado flesh and add it to the bowl along with the finely diced cooked chicken, celery, red onion, and chopped parsley or cilantro.
Gently stir to combine, tasting and adjusting seasoning; add 1–4 tablespoons more mayonnaise if a creamier texture is desired.
Serve on toasted bread with extra mayo if desired, or use in a lettuce wrap or with pita chips; best enjoyed immediately.