When I first tasted a Japanese Egg Sandwich, or Tamago Sando, it transported me to the bustling streets of Tokyo. This delightful snack, with its creamy egg mayo filling tucked between fluffy slices of shokupan, is a revelation. Not only is it incredibly easy to whip up, but it also captures the essence of Japanese convenience-store cuisine right in your kitchen. This sandwich is perfect for a quick lunch or a soothing afternoon treat, offering a unique flavor experience that is both comforting and filling. Imagine enjoying a soft, rich bite that melts in your mouth while savoring the umami kick from Kewpie mayo. Intrigued? Let’s dive into making this delicious treat at home!

Why Is Tamago Sando So Special?
Simplicity: This recipe is incredibly easy to follow, making it suitable for both novice cooks and seasoned chefs looking for a quick, yet delightful snack.
Creamy Umami Bliss: With the unique use of Kewpie mayo, your taste buds will revel in a rich flavor profile that’s hard to resist.
Versatile Snack: Whether enjoyed at lunch, as a snack, or at tea time, this sandwich fits seamlessly into any meal.
Unique Textures: The soft shokupan bread combined with the creamy filling creates a comforting bite that’s oh-so-satisfying.
Quick Preparation: Ready in just about 20 minutes, you’ll have this delicious sandwich on your plate in no time—perfect for those busy days!
Interested in more delightful snacks? Check out my Breakfast Egg Muffins for a perfect on-the-go option!
Japanese Egg Sandwich Ingredients
Discover the essential ingredients for this delicious Japanese Egg Sandwich (Tamago Sando) that will elevate your snacking game!
For the Egg Filling
- Large-sized eggs – A base for both hard-boiled and medium-boiled components; using room temperature makes peeling easier.
- Whole milk – Adds creaminess to the filling, but you can substitute with plant-based milk for a non-dairy version.
- Kewpie Japanese Mayonnaise – Offers a distinct umami flavor that enhances the egg mixture; opting for the Japanese version is recommended.
- White granulated sugar – Balances flavor and enhances sweetness; this ingredient is essential for a well-rounded taste.
- Salt – Enhances overall flavor; Diamond Crystal offers the best texture, though table salt can be used (adjust accordingly).
- Black pepper – Adds a hint of spice; this is optional but recommended for an extra flavor kick.
For the Bread and Spreading
- Shokupan (Japanese milk bread) – The traditional bread choice for its soft texture; if unavailable, you can use soft white bread instead.
- Unsalted butter – Perfect for spreading on the bread; ensure it’s softened for easy application.
For Garnish
- Chives – Optional for a burst of color and flavor; finely chopped green onions can be a delightful alternative, or it can be omitted altogether.
Now that you have the ingredients ready, let’s create this exquisite Japanese Egg Sandwich that will surely impress!
Step‑by‑Step Instructions for Japanese Egg Sandwich
Step 1: Boil Eggs
Begin by bringing a pot of water to a boil over medium-high heat. Carefully add large eggs and boil for 7 minutes and 30 seconds for medium-boiled eggs, or 9 minutes for hard-boiled. When done, promptly transfer the eggs to an ice bath for at least 5 minutes to stop the cooking process and prevent a greenish yolk.
Step 2: Prepare Filling
After the eggs have cooled, gently tap and peel the shells off the hard-boiled eggs, then slice them in half. Place the yolks and whites in a bowl, mashing them with a fork until crumbly. Add in whole milk, Kewpie mayo, sugar, salt, and black pepper, mixing until the ingredients are well combined and creamy. Refrigerate for 10 minutes to allow the flavors to meld.
Step 3: Assemble Sandwich
While the egg filling chills, prepare your shokupan slices by cutting off the crusts for an authentic touch. Spread a generous amount of softened butter on one side of each slice to enhance flavor and moisture. Place two medium-boiled egg halves on two of the slices, followed by a generous layer of the prepared egg mayo mixture.
Step 4: Complete the Sandwich
Carefully place the remaining slices of buttered shokupan on top of the egg mayo layers, buttered side facing down. Gently press the sandwich together to compress the filling slightly, ensuring that every bite is deliciously packed.
Step 5: Serve
With the Japanese Egg Sandwich now assembled, slice it diagonally in half to reveal the creamy filling. Serve these delightful sandwiches immediately for the best texture, pairing them with green tea or pickled vegetables for an authentic Japanese experience.

Make Ahead Options
These Japanese Egg Sandwiches (Tamago Sando) are fantastic for meal prep, making your busy weeknights a breeze! You can boil the eggs up to 24 hours in advance and prepare the creamy egg filling, keeping it tightly sealed in an airtight container in the refrigerator to maintain its mouthwatering quality. Assemble the sandwich just before serving to ensure the bread remains soft and the filling stays fresh. For the best results, spread the butter on the bread slices shortly before assembly to prevent sogginess. With a bit of advance prep, you’ll enjoy delightful, homemade sandwiches that are just as delicious and satisfying whenever you choose to savor them!
What to Serve with Japanese Egg Sandwich?
Elevate your meal with delightful pairings that perfectly complement the creamy richness of your Tamago Sando!
- Green Tea: Offers a refreshing contrast, soothing your palate and enhancing the umami flavors of the sandwich.
- Pickled Vegetables: Their tangy crunch provides a delightful textural balance and bright flavor that cuts through the creaminess.
- Fruit Salad: Juicy, fresh fruits add a sweet and refreshing component, perfect for balancing the savory egg filling.
- Edamame: Lightly salted, these tender beans are a great source of protein and add a satisfying bite beside your sandwich.
- Miso Soup: A warm, savory bowl brings comforting warmth and depth, making for a cozy, satisfying meal experience.
- Cucumber Salad: Crisp and vibrant, this refreshing side dish introduces a light crunch that complements the soft, creamy sandwich beautifully.
- Japanese Beer: The light, crisp flavors of a Japanese lager or ale enhance your meal’s experience, bringing a perfect drink pair to the table.
- Matcha Latte: Creamy and subtly sweet, this drink pairs wonderfully with the sandwich, offering a unique twist that delights the senses.
How to Store and Freeze Japanese Egg Sandwich
Fridge: Store your assembled Japanese Egg Sandwich in an airtight container in the refrigerator for up to 1 day to maintain freshness. The filling may become soft if stored longer.
Freezer: It’s best to freeze the egg filling separately, as the bread can become soggy. Store the egg mayo mixture in an airtight container for up to 2 months.
Reheating: If you’ve frozen the egg filling, thaw it in the fridge overnight, then reassemble the sandwich just before serving for best results.
Texture Note: For optimal flavor and texture, it’s recommended to consume your Tamago Sando fresh rather than stored or frozen.
Expert Tips for Japanese Egg Sandwich
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Egg Timing: Ensure to boil medium and hard-boiled eggs for the correct amount of time—7 minutes and 30 seconds for medium, 9 minutes for hard. This prevents overcooking.
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Peeling Made Easy: Use eggs that aren’t super fresh for easier peeling. Older eggs tend to peel more smoothly, preventing frustrating bits of shell sticking.
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Chill the Filling: Keeping the egg mayo mixture chilled before assembly thickens it, making it easier to spread without oozing out.
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Avoid Over-Salting: Taste the egg filling mixture before serving. Remember, the Kewpie mayo and butter add plenty of flavor, so go easy on the salt.
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Perfect Slice: For a clean presentation, use a sharp knife to slice your sandwiches. The diagonal cut not only looks nice but also makes them easier to handle.
Japanese Egg Sandwich Variations
Feel free to get creative with your Japanese Egg Sandwich and customize it to your taste buds!
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Spice it up: Add a hint of mustard or Sriracha to the egg mayo for a spicy twist. This simple addition can elevate the flavor profile, making each bite a delightful surprise.
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Herbs & Greens: Mix in finely chopped parsley or baby spinach for a fresh touch. You can also experiment with basil or cilantro, bringing a burst of color and flavor that invigorates your sandwich.
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Avocado Delight: Slice fresh avocado for a creamy texture contrast. This variation introduces healthy fats and a rich taste that complements the egg filling beautifully.
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Cheesy Option: Add shredded cheese like cheddar or mozzarella to the filling for a melty treat. The creaminess of the cheese pairs perfectly with the eggs, making it an indulgent choice.
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Smoky Flavors: Incorporate smoked paprika or even a touch of smoked salmon into the egg mix. The added depth from the smoky flavor tantalizes the palate and adds an exquisite gourmet touch.
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Pickled Veggie Crunch: Include thinly sliced pickled cucumbers or carrots for a crunchy bite. This tangy twist adds a refreshing element that pairs wonderfully with the creamy filling.
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Gluten-Free Choice: Substitute shokupan with gluten-free bread. It’s essential to choose a brand that maintains a soft texture, ensuring you preserve the sandwich’s comforting feel.
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Herbal Infusion: Swap chives for finely chopped dill or tarragon. This small tweak enhances the flavor profile and adds a unique herbal note that pleasantly surprises your taste buds.
Whether you want to go spicy, cheesy, or veggie-forward, these variations will turn your Tamago Sando into a sandwich that fits your craving. Don’t forget to check out my Breakfast Egg Muffins for more yummy ideas or explore different fillings for the classic egg sandwich!

Japanese Egg Sandwich (Tamago Sando) Recipe FAQs
How can I select the best eggs for my Japanese Egg Sandwich?
Absolutely! For the best results, choose large eggs that are at room temperature. This makes them easier to peel after boiling. Look for eggs with a smooth, uncracked shell and a sell-by date that’s still valid. If possible, opt for eggs that aren’t too fresh, as older eggs tend to peel more cleanly.
How should I store my Japanese Egg Sandwich?
Very simple! You can keep the assembled sandwiches in an airtight container in the refrigerator for up to 1 day. However, this delightful snack is best enjoyed fresh. If they are stored for longer than a day, the filling may start to lose its texture.
Can I freeze the Japanese Egg Sandwich?
While it’s not advisable to freeze the whole sandwich due to soggy bread, you can definitely freeze the egg filling! Transfer the egg mayo mixture into an airtight container and store it in the freezer for up to 2 months. When you’re ready to enjoy it, simply thaw it in the refrigerator overnight and then reassemble your sandwich fresh in no time.
What do I do if my eggs are overcooked?
If your eggs turn out overcooked and you notice a greenish yolk, don’t fret! While it won’t affect the flavor drastically, you can still salvage them for the egg mayo filling. Ensure to mash them finely and mix in plenty of Kewpie mayo and whole milk to adjust the texture. This will balance the taste while masking any undesired texture from the overcooked yolk.
Are there any dietary considerations for the ingredients used?
Absolutely! If you’re creating this dish for someone with dietary restrictions, you can easily adjust it. For a non-dairy version, substitute whole milk with a plant-based milk like almond or soy milk, and make sure to choose a dairy-free spread in place of butter. For allergies, ensure the Kewpie mayo contains no allergens that affect your guests. Always check labels to confirm any dietary needs are met.
Can I add different ingredients to the egg filling?
Very much so! The beauty of the Japanese Egg Sandwich lies in its flexibility. You can add various ingredients like mustard for a zesty kick or finely chopped herbs like parsley or dill for added freshness. The more the merrier! Feel free to experiment with flavors to make the sandwich truly your own!

Japanese Egg Sandwich Recipe - Creamy Umami Bliss Await
Ingredients
Equipment
Method
- Bring a pot of water to a boil and add the large eggs. Boil for 7 minutes and 30 seconds for medium-boiled or 9 minutes for hard-boiled eggs. Transfer eggs to an ice bath for at least 5 minutes.
- Peel the cooled eggs and mash yolks and whites in a bowl. Add milk, Kewpie mayo, sugar, salt, and black pepper, mixing until combined. Refrigerate for 10 minutes.
- Cut off the crusts of shokupan slices. Spread softened butter on one side of each slice. Place two medium-boiled egg halves on two slices and add a generous layer of the egg mayo mixture.
- Place the remaining buttered shokupan slices on top, buttered side down. Press the sandwich to compress the filling slightly.
- Slice the assembled sandwich diagonally and serve immediately with green tea or pickled vegetables.

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