
This chicken avocado melt sandwich combines the perfect balance of juicy chicken, creamy avocado and gooey melted cheese all nestled between golden toasted bread. I discovered this recipe during a particularly hectic work week and it has become my go-to solution for nights when I want something satisfying without spending hours in the kitchen.
I first created this sandwich when trying to use up leftover grilled chicken and a perfectly ripe avocado. What started as a simple lunch experiment has become one of my most requested recipes among friends and family who visit.
Ingredients
- Boneless skinless chicken breasts: The foundation of the sandwich providing lean protein and a hearty bite
- Salt and pepper: Essential for properly seasoning the chicken to enhance its natural flavor
- Olive oil: Helps achieve a beautiful golden sear on the chicken while adding a subtle richness
- Avocado: Contributes a buttery creaminess that balances the savory elements
- Cheese slices: Creates that irresistible melty factor look for high quality cheese that melts well
- Bread: The vehicle for all these delicious ingredients choose something sturdy enough to hold up
- Mayonnaise: Creates a moisture barrier on the bread and adds richness
- Dijon mustard: Provides a tangy kick that cuts through the richness of the other ingredients
- Red onion: Adds a sharp aromatic crunch and beautiful color contrast
- Tomato: Contributes juicy freshness and acidity to balance the rich elements
- Butter or olive oil: Creates that perfect golden crisp exterior on your sandwich
Step-by-Step Instructions
- Prepare the Chicken:
- Season chicken breasts generously with salt and pepper on both sides making sure to cover the entire surface. Heat olive oil in a skillet until shimmering but not smoking. Place chicken in the pan and let it cook undisturbed for the first few minutes to develop a golden crust. Cook for 6 to 7 minutes per side until the internal temperature reaches 165°F. Allow the chicken to rest for at least 5 minutes before slicing to keep all those flavorful juices locked inside. Slice into thin pieces against the grain.
- Prep the Components:
- While the chicken rests slice your avocado into thin even pieces. Have your cheese slices ready and at room temperature for better melting. Slice red onion as thinly as possible either with a sharp knife or mandoline for best texture. Cut tomato into even slices about quarter inch thick patting them gently with a paper towel to remove excess moisture.
- Prepare the Bread:
- Spread a thin even layer of mayonnaise on one side of each bread slice making sure to reach all the way to the edges. This creates a moisture barrier and helps achieve that golden crust. On the inside of two bread slices spread a thin layer of Dijon mustard for that tangy kick.
- Assemble the Sandwiches:
- On the mustard side of two bread slices begin layering in this order chicken slices avocado cheese slices red onion and tomato. Place the remaining bread slices on top with the mayo side facing outward. Press down gently to compact the sandwich slightly for easier cooking.
- Grill to Perfection:
- Heat a large skillet over medium heat and add butter or olive oil. Once melted place the sandwiches in the pan and cook for 3 to 4 minutes without moving them. Apply gentle pressure with a spatula to ensure even contact with the pan. Flip carefully using a wide spatula and cook the second side for another 3 to 4 minutes until golden brown and the cheese is completely melted.
- Serve Immediately:
- Remove from heat and let rest for just a minute. Slice diagonally with a sharp knife to showcase the beautiful layers. Serve while still warm with your favorite side like chips pickle spears or a simple salad.

The Dijon mustard is my secret weapon in this sandwich. I discovered its importance accidentally when I ran out of regular mustard one day. The subtle tang and depth it adds completely transforms the flavor profile from ordinary to extraordinary making it an absolute must include ingredient.
Make Ahead Options
This sandwich can be partially prepared in advance to save time during busy weekdays. Cook and slice the chicken up to two days ahead and store it in an airtight container in the refrigerator. You can also slice the onions and store them in water in the refrigerator to reduce their sharpness. Wait to slice the avocado and tomato until just before assembly to prevent browning and maintain their texture.
Customization Ideas
While this recipe creates a perfect balance of flavors don't be afraid to make it your own. For a spicy version add jalapeño slices or a drizzle of hot honey. Bacon makes an excellent addition for extra savory crunch. For a lighter option use mashed white beans instead of chicken for a vegetarian alternative that still provides protein. The sandwich also works beautifully with a sprinkle of fresh herbs like cilantro or basil added just before serving.
Serving Suggestions
This sandwich stands as a complete meal on its own but pairs beautifully with several sides. A light arugula salad dressed simply with lemon and olive oil complements the richness of the sandwich. Sweet potato fries offer a colorful contrast and additional nutritional benefits. For a more substantial meal serve alongside a cup of tomato soup for the ultimate comfort food combination perfect for dipping those crispy sandwich corners.
Common Queries
- → What type of bread works best for this sandwich?
Sourdough and ciabatta provide excellent structure and crunch, but any sturdy bread will hold the fillings and toast well.
- → Can I use a different protein instead of chicken?
Absolutely! Turkey or rotisserie chicken make convenient alternatives without sacrificing flavor or texture.
- → How do I keep the chicken juicy?
Let the cooked chicken rest for a few minutes before slicing. This helps preserve its natural juices and tenderness.
- → What cheese varieties can I use?
Swiss, cheddar, or provolone melt well and complement the avocado and chicken, but use your favorite melty cheese if preferred.
- → How can I add extra flavor?
Try sprinkling crushed red pepper or your favorite seasonings between the layers for a flavorful kick.
- → Is it possible to make this ahead?
For freshest results, assemble and grill just before serving. However, you can prep the fillings in advance to save time.