Introduction to Spicy Tuna Onigiri
Why You Should Try Homemade Onigiri
If you’ve never experienced the joy of homemade spicy tuna onigiri, you’re in for a treat! Not only is this Japanese comfort food delicious, but making it at home allows you to customize flavors and ingredients to suit your taste. Onigiri is versatile—perfect for lunchboxes, picnics, or quick snacks. Plus, with just a few simple ingredients, you can create a nutritious meal that's as satisfying as it is fun to prepare.
A Brief History of Onigiri
Onigiri, also known as rice balls, have a rich history in Japanese cuisine that dates back more than a thousand years. Originally, these delightful morsels were made to preserve rice and make it easier to carry during travel. Over time, they evolved into a beloved staple found in lunchboxes and convenience stores across Japan. Traditionally shaped into triangles or balls, onigiri is often filled with various ingredients like pickled plums, salmon, or, in our case, deliciously spicy tuna. If you're curious to dive deeper into the history of onigiri, check out resources like Just One Cookbook for fascinating insights.
Making spicy tuna onigiri is not just about food—it's a cultural experience that seamlessly blends history, flavor, and a bit of creativity. So grab your apron and let’s get started on this journey!

Ingredients for Spicy Tuna Onigiri
Essential ingredients
Creating delicious spicy tuna onigiri begins with sourcing the right ingredients. Here’s what you’ll need for this mouthwatering dish:
- Japanese short-grain rice: About 1½ cups for that perfect sticky texture.
- Canned tuna: A 4.5-ounce can of Portofino Solid Albacore Tuna in Extra Virgin Olive Oil is ideal for flavor and moisture.
- Mayonnaise: 1½ tablespoons to create a creamy filling.
- Sriracha hot sauce: Just 1 teaspoon adds a kick of spice—adjust to your taste!
- Rice vinegar: A half teaspoon brightens up the filling.
- Scallions: One finely sliced for that fresh crunch.
- Kosher salt and water: Essential for seasoning and cooking the rice.
Optional toppings and fillings
To personalize your spicy tuna onigiri, think about adding some optional toppings or fillings. Here are a few ideas:
- Toasted black sesame seeds: These add a delightful nuttiness and texture.
- Nori sheets: Cut them into strips or triangles for wrapping, enhancing both flavor and presentation.
- Additional sauces: Consider drizzling more sriracha or a soy sauce glaze for extra zest.
For more ingredient ideas, check out Epicurious. The versatility of onigiri means you can get creative—feel free to experiment with what you have on hand!
Preparing Spicy Tuna Onigiri
Making spicy tuna onigiri at home is an exciting culinary adventure that treats your palate to an explosion of flavors. It's a fun dish that allows for creativity and expression, all while being surprisingly easy to prepare. Let's dive into the steps for making your own delicious onigiri.
Step 1: Prepare the Rice
The key to superior onigiri begins with perfectly cooked rice. Start by rinsing 1½ cups of Japanese short-grain rice under cold water in a fine-meshed sieve. This process is essential, as it removes excess starch and ensures a fluffy texture. Rub the grains gently until the water runs clear, then drain thoroughly.
Cook the rice with 15 fluid ounces of cold water in a rice cooker following the manufacturer’s instructions for the best results. If you don't have a rice cooker, no worries! Combine the rinsed rice and water in a medium saucepan, bring it to a boil, then reduce the heat to low and cover for about 16-18 minutes until the water is absorbed. Let it stand for 10 minutes with a clean kitchen towel under the lid to achieve that perfect fluffiness.
Step 2: Make the Spicy Tuna Filling
Now that your rice is cooking, it’s time to whip up the delicious filling. In a medium bowl, combine 1 can of Portofino Solid Albacore Tuna, 1½ tablespoons of mayonnaise, 1 teaspoon of sriracha, and ½ teaspoon of rice vinegar using a fork. Mix it well so all those rich flavors meld together. Finally, gently fold in the finely sliced green parts of 1 scallion. This combination adds a delightful kick that makes your spicy tuna onigiri truly special.
Step 3: Assemble the Onigiri
Let’s get our hands a little messy! First, prepare a medium bowl of room temperature water and a small bowl of kosher salt for pinching. Once your sushi rice is cool enough to handle, moisten your hands by dipping them into the water, then sprinkle some salt on your palms.
Grab about ½ cup of sushi rice, press it into a thick, oblong shape, and make a small indentation in the center. Add a tablespoon of your spicy tuna filling right into that pocket! If needed, use more rice to enclose the filling securely.
Step 4: Shape the Onigiri
This is where the magic happens! Gently mold your rice ball into a wide triangular shape using one hand while supporting it with your other. The trick is to avoid compressing the rice too tightly; you want it to hold together while remaining light and fluffy. For an extra touch, sprinkle some toasted black sesame seeds on the outside for added texture and flavor!
Step 5: Serve Your Tasty Creation
Wrap each spicy tuna onigiri in a half sheet of toasted nori and top with a little extra tuna filling for that professional touch. Whether you serve them as snacks, lunch, or part of a dinner spread, these onigiri are sure to impress. Enjoy your creation immediately for the best taste experience!
Experimenting with onigiri can lead to endless possibilities and flavors. So why not swap ingredients or try different fillings next time? Your imagination is the limit in this delightful Japanese dish.

Variations on Spicy Tuna Onigiri
Spicy Salmon Onigiri
If you’re a fan of spicy tuna onigiri, why not switch things up with spicy salmon? All you need to do is substitute the tuna with fresh or canned salmon mixed with the same creamy mayonnaise and zesty sriracha. The result? A delightful burst of flavor that’s just as satisfying. For an added kick, consider blending in chopped jalapeños or a dash of wasabi!
Veggie Onigiri Options
For a lighter touch, try a veggie onigiri filled with avocado, cucumber, and sesame seeds. You can enhance the filling with a hint of spicy mayo or a drizzle of soy sauce. This twist not only makes for a colorful presentation but also caters to our vegetarian friends. If you’re looking for inspiration, check out more plant-based recipes here.
Cooking Tips and Notes for Spicy Tuna Onigiri
Best Practices for Cooking Sushi Rice
To achieve perfectly fluffy and well-cooked sushi rice, remember to rinse it under cold water until it runs clear. This step removes excess starch, yielding a better texture. If you don’t have a rice cooker, simmering on low heat in a saucepan is also effective; just ensure the lid remains on during cooking to retain steam.
Storing Leftover Onigiri
If you have spicy tuna onigiri leftovers, store them in an airtight container in the fridge for up to a day. To maintain freshness, consider wrapping each onigiri in plastic wrap. When ready to eat, gently reheat them in a microwave or enjoy them cold for a quick snack. Just remember, freshness is key for the best flavor! For more storage tips, check out this guide on food storage.

Serving Suggestions for Spicy Tuna Onigiri
Pairing with Dips and Sauces
To enhance your spicy tuna onigiri, consider serving it alongside a creamy avocado dip or a tangy miso dressing. These add a burst of flavor and a delightful contrast in texture. For a bit of heat, a side of extra sriracha or soy sauce can also elevate the experience, giving you that perfect balance of spicy and savory.
Great Sides to Complement Onigiri
Looking to round out your meal? Pair your spicy tuna onigiri with fresh, crisp sides like a garden salad or some pickled vegetables. You might also enjoy slices of cucumber or edamame for a refreshing contrast. If you're feeling a bit adventurous, try a bowl of miso soup for a warm, comforting addition. These combinations not only complement but also enrich this delightful dish!
Time Breakdown for Spicy Tuna Onigiri
Preparation Time
The prep for these delicious spicy tuna onigiri takes about 20 minutes. You’ll be rinsing and cooking the rice, as well as whipping up that tasty filling in no time!
Cooking Time
Set aside 30 minutes for cooking the rice to get that perfect, fluffy texture. A rice cooker is your best friend here, but a saucepan works too!
Total Time
In total, you’ll be looking at around 50 minutes from start to finish. That’s a pretty quick turnaround for a homemade delight that's sure to impress your friends and family!
For more on preparing sushi rice, check out this guide from a trusted culinary resource. Want to level up your onigiri skills? Here's a video tutorial that shows fun variations!
Nutritional Facts for Spicy Tuna Onigiri
Calories
A serving of spicy tuna onigiri typically contains about 250-300 calories, making it a satisfying yet light option for lunch or a snack.
Protein Content
With roughly 15-20 grams of protein per serving, this tasty onigiri is a great way to fuel your day, thanks to its delicious tuna filling.
Carbohydrates
Each spicy tuna onigiri has around 35-40 grams of carbohydrates, primarily coming from the sushi rice, providing a nice energy boost.
While enjoying these delightful rice balls, consider their nutritional benefits, perfect for a balanced meal. For more insights on the nutritional value of tuna, check out Healthline.
FAQs about Spicy Tuna Onigiri
Can I make onigiri ahead of time?
Absolutely! Spicy tuna onigiri can be prepared in advance, making them a convenient grab-and-go snack. For the best texture, assemble the onigiri and wrap them in nori just before serving. If you store them in an airtight container in the fridge, enjoy them within a day for optimal freshness.
What can I use instead of nori?
If nori isn’t your thing or you want to try something different, you can use thinly sliced cucumber or even parchment paper to wrap your onigiri. This not only adds a unique twist but can also cater to those with dietary preferences.
Is onigiri gluten-free?
Yes! As long as you use gluten-free soy sauce or teriyaki sauce if adding for flavor, spicy tuna onigiri can easily be a gluten-free delight. Always check the ingredient labels on your additional products to ensure they meet your dietary needs.
Conclusion on Spicy Tuna Onigiri
Recap of the joys of homemade onigiri
Making spicy tuna onigiri at home is a delightful experience that combines the fun of cooking with the joy of enjoying fresh, personalized flavors. The satisfaction of crafting these perfectly shaped rice balls brings a unique sense of accomplishment.
Encouragement to experiment with flavors
Don’t hesitate to play with different fillings! From veggies to proteins, the possibilities are endless. You can tailor each batch of spicy tuna onigiri to your taste, making every meal a new adventure. Enjoy creating and sharing these tasty treats!

Spicy Tuna Onigiri
Equipment
- Rice cooker
- Fine-meshed sieve
- medium bowl
- Saucepan
Ingredients
Rice
- 1.5 cups Japanese short-grain rice about 2 rice cooker cups
- 15 fluid ounces cold water
- kosher salt
Filling
- 1 (4.5-ounce) can Portofino Solid Albacore Tuna in Extra Virgin Olive Oil drained
- 1.5 tablespoons mayonnaise
- 1 teaspoon sriracha hot sauce
- 0.5 teaspoon rice vinegar
- 1 piece scallion green parts only, finely sliced
- toasted black sesame seeds for sprinkling (optional)
- 3 sheets toasted nori cut crosswise in half
Instructions
Preparation
- Place the rice in a fine-meshed sieve and rinse well under cold water until the water runs clear. Drain well.
- Combine the rice and water, and cook in a rice cooker according to the manufacturer’s directions. If you do not own a rice cooker, combine the rice and water in a medium saucepan, bring to a boil, reduce heat to low, cover and cook for 16 to 18 minutes until the water is absorbed. Remove from heat, fluff the rice, cover with a kitchen towel, and let stand covered for 10 minutes.
- In a medium bowl, combine the albacore tuna, mayonnaise, hot sauce, and rice vinegar with a fork until evenly combined. Stir in the scallions.
- Set aside a medium bowl of room temperature water and a small bowl of kosher salt for pinching. Once the sushi rice is cool enough to handle, start assembling the onigiri by hand.
- Lightly moisten your hands with water and sprinkle with kosher salt. Grab roughly a ½ cup of sushi rice and gently press into a thick oblong shape. Add a tablespoon of the tuna filling, close the rice over the filling and shape into a wide triangular shape.
- Sprinkle the outside of the onigiri with black sesame seeds. Wrap each onigiri in a nori sheet and place an additional small spoonful of tuna filling on top of each onigiri. Serve immediately.





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