Skip to content
Home » Sandwiches » Tuna Croissant Sandwich

Tuna Croissant Sandwich

    tuna croissant sandwich

    This tuna croissant sandwich will give you major nostalgia for the tuna sandwiches you ate growing up! The delicious and flavorful tuna salad is the perfect bed for fresh ingredients and pickles to round out the flavors. 

    Biting into the flaky, buttery croissant brings a new twist to the classic sandwich, lending a hint of French charm. The slight crunch from the pickles provides a beautiful contrast to the softness of the tuna salad, creating a symphony of textures in your mouth. Every bite will transport you back to your childhood kitchen table, yet with a gourmet touch that makes the experience distinctly modern and unique.

    Love croissants? Me too! Check out these other recipes for Vegetarian Croissant Sandwich, Vegan Croissant Sandwich, Croissant Muffins (Cruffins), Strawberry Croissants, and Bacon, Egg and Cheese Croissant.

    Why You’ll Love This Recipe

    Next-level satisfaction: A tuna sandwich is always a good way to satisfy hunger, but this tuna salad croissant recipe takes it to the next level. The flaky croissant adds an extra element of decadence to an already delicious sandwich.

    Nutritious yet delicious: Tuna is a fantastic source of protein, making this sandwich not only tasty but also incredibly healthy. The addition of vegetables such as celery, green onions, and heritage greens further enhances its nutritional value.

    Quick and easy: This recipe is perfect for those hectic days when you have very little time but still want a fulfilling meal. It’s a breeze to put together and packs in so much flavor that you’ll want to make it the next time, too!

    Recipe Ingredients

    You’ll need the following ingredients to make this delicious croissant sandwich with tuna:

    ingredients to make a tuna croissant sandwich

    Ingredient Notes

    Croissant: Regular croissants are great, but a sandwich croissant is even better. It gives you more room to pack in that delicious tuna salad. Either way, ensure that your croissants are fresh and flaky. If you find them on sale, don’t hesitate to stock up—they can always be frozen for later use.

    Canned Tuna: Always make sure to drain the tuna well to avoid a soggy sandwich.

    Mayonnaise: If you want to take your sandwich to the next level, use Kewpie mayonnaise. It’s a Japanese mayo that’s creamier and tangier than regular mayo. If it’s not available at your regular grocery store, regular mayo works fine. You can even make sriracha mayo for an added kick!

    Salt and Pepper: Sea salt and black pepper are the keys to bringing out the flavor of the tuna. Feel free to adjust the quantities according to your taste.

    How To Make a Tuna Croissant Sandwich

    Make the tuna: In a small bowl, add your tuna, celery, green onions, and salt and pepper. Using a spoon, mix until thoroughly combined. Once ready, set aside.

    tuna salad

    Toast your croissants: Heat your croissant in a toaster and cook until golden brown. Alternatively, you can also heat your croissant in the oven at 350˚F for 10 minutes face down. 

    toasted croissants

    Assemble your sandwich: Start assembling your sandwich beginning with the tuna, followed by the pickles, tomatoes, onions, and greens. Place the top of the croissant to cover and serve.

    assembled tuna croissant sandwich

    Recipe Tips

    • Chop the celery and green onions finely to ensure an even distribution of flavor throughout the sandwich.
    • When preparing the tuna salad, combine it in a large bowl to make sure all the ingredients are well-incorporated.
    • If your croissants are not fresh, heat them in the oven first. The heat will make the croissants flakier and tastier.

    Storage & Reheating

    This sandwich is best consumed fresh. However, if you need to store it, it’s best to store the components separately and assemble them when you’re ready to eat. The tuna salad can be stored in an airtight container in the fridge and used the next day. The croissant can be reheated in an oven until it’s warm and flaky.

    Additions & Substitutions

    You can replace the mayonnaise with Greek yogurt or add a squirt of lemon juice for some tanginess. If you want some extra crunch, add some lettuce or cucumber. For those who like it spicy, a sprinkle of chili flakes can do the trick.

    Recipe FAQs

    What should I serve with this tuna salad sandwich recipe?

    There are many options you can choose from. Some great ones that come to mind are potato chips, pasta salad, fruit salad, or even tomato soup! The possibilities are truly endless depending on how you’re feeling on the day.

    Can I make this in advance? 

    You can make the separate ingredients in advance like the tuna salad and slice the ingredients to have them ready. I would recommend not adding them together beforehand, as the tuna may make the bun and the rest of the ingredients soggy. 


    Here are a few other sandwiches you might enjoy!

    tuna croissant sandwich

    Tuna Croissant Sandwich

    Matthew Chin
    This crispy, flakey, and delicious tuna croissant sandwich is a trip down memory lane. Made with tuna, mayonnaise, and delicious fresh vegetables, this is a great option when you’re in a pickle.
    5 from 1 vote
    Prep Time 5 minutes
    Cook Time 5 minutes
    Total Time 10 minutes
    Course Breakfast
    Servings 2
    Calories 419 kcal

    Ingredients
      

    • 1 croissant sandwich
    • 1 can tuna
    • 4 tbsp mayonnaise
    • ¼ cup red onion sliced
    • ¼ cup celery chopped
    • 2 tbsp green onions sliced
    • ¼ cup Heritage Greens
    • 2-3 pickles sliced
    • 1 tomato sliced
    • Salt and pepper to taste

    Instructions
     

    • In a small bowl, add your tuna, celery, green onions, and salt and pepper.
    • Using a spoon mix until thoroughly combined. Once ready, set aside.
    • Heat your croissant in a toaster and cook until golden brown.
    • Once ready, place the croissant sandwich on a serving plate.
    • Start assembling your sandwich beginning with the tuna, followed by the pickles, tomatoes, onions, and greens.
    • Place the top of the croissant to cover.
    • Serve and enjoy!

    Notes

    When you’re using canned tuna, watch out for the water content! It’s important to drain the tuna completely or else the mayonnaise and spices will pool to the bottom and lose their flavor.
    I am not a big fan of the saltier brines of pickles, so we went with gherkins, which are more on the sweeter end. You are free to use your favorite pickle, but we recommend dill or gherkins as they have just a little more flavor and bite than others, which will enhance the dish overall.
    You can make the separate ingredients in advance like the tuna salad and slice the ingredients to have them ready. I would recommend not adding them together as the tuna may make the bun and the rest of the ingredients soggy.

    Nutrition

    Calories: 419kcalCarbohydrates: 25.1gProtein: 27.1gFat: 20.8gSaturated Fat: 9gFiber: 2.6gSugar: 7.4g
    Tried this recipe?Let us know how it was!

    Matthew is a recipe developer and food photographer based in Canada. He enjoys all things food, drink and makes his best decisions with a mimosa in hand.

    Like this recipe? Leave your comments below!

    Your email address will not be published. Required fields are marked *

    Recipe Rating