Breakfast & Brunch
This Spam and egg onigiri recipe delivers that perfect handheld Japanese bite—soft, fluffy rice wrapped around savory filling with crisp edges and a satisfying shape.
The secret lies in using just the right amount of rice vinegar and salt to season the sushi rice, creating a delicate balance that keeps the texture tender yet sturdy enough to hold its form.
I’ve tested countless variations, and this method guarantees onigiri that stays intact even when grilled or steamed.
What makes these onigiri truly special is the combination of Spam and scrambled eggs—a classic pairing in Japanese bento boxes that adds richness without overpowering the delicate rice.
The filling is seasoned with soy sauce and a touch of sugar, giving it that signature umami depth that makes every bite irresistible. The shaping technique is simple but critical: using damp hands ensures the rice doesn’t stick, and the triangular form is both traditional and practical for easy eating.
By the end, you’ll have perfectly shaped onigiri with a slightly crisp exterior from grilling or steaming, and a soft, fluffy interior that melts in your mouth. Serve them warm with a drizzle of soy sauce or sprinkled with furikake for that authentic touch.
These bites are ideal for breakfast, lunch, or even as a snack—versatile enough for everyday meals but impressive enough for gatherings.
Whether you’re a beginner or an experienced cook, this recipe is designed to be foolproof. The step-by-step instructions cover everything from cooking the rice to assembling and shaping the onigiri, ensuring you achieve restaurant-quality results at home. Let’s get started!
Ingredients for spam and egg onigiri
Twelve simple ingredients for twelve perfect handheld bites—no fancy tools, just good technique.
| Ingredient | Amount | Notes |
|---|---|---|
| Short-Grain Japanese Rice 🍚 | 3 cups | Uncooked, sushi rice preferred |
| Water 💧 | 2 ¾ cups | For rice cooking (1:0.9 ratio) |
| Rice Vinegar 🍶 | 0.05 cup | Seasoned or unseasoned |
| Salt 🧂 | ¾ tsp | Fine sea salt |
| Spam (Canned) 🥓 | 1 can | Diced into 1/2-inch cubes |
| Large Eggs 🥚 | 4 whole | Scrambled, not runny |
| Soy Sauce 🍶 | 0.05 cup | Japanese-style preferred |
| Granulated Sugar 🍚 | ½ tsp | For filling balance |
| Vegetable Oil 🫒 | 1 tbsp | For pan coating |
| Sesame Seeds 🌾 | ½ tbsp | Toasted, optional garnish |
| Furikake Seasoning 🌶️ | ¼ cup | For topping (optional) |
| Lemon Juice 🍋 | ½ tsp | For rice freshness |
The rice is everything. Koshihikari or Calrose from Asian markets is ideal—those little grains stick together like glue. If you're using regular jasmine rice, add an extra 0.25 tsp salt to the water. The Spam? Hormel Classic is the gold standard—diced it into 1/2-inch cubes so they fit neatly in the rice. Eggs should be scrambled just until set (no overcooking—we want that creamy texture). For the soy sauce, Kikkoman or Yamasa gives that authentic umami punch. Pro tip: Toast your sesame seeds in a dry pan for 30 seconds—they'll taste a thousand times better.
No rice vinegar? Apple cider vinegar in a pinch, but it won't taste quite the same. Short on soy sauce? Coconut aminos at half the amount works in a bind. The sugar is non-negotiable—it balances the saltiness of the Spam and eggs. If you're vegetarian, swap the Spam for marinated tofu cubes (press and bake first). For the eggs, I always use room-temperature eggs—they scramble faster and more evenly. And if your hands are dry while shaping, just wet them again—damp hands are key to prevent sticking. No furikake? Toasted nori flakes make a great substitute.
Rice keeps 2 days in the fridge, but make fresh filling the day of—it's better that way. Shape the onigiri while the rice is still warm (about 20 minutes after cooking). For extra crispiness, pan-fry them in vegetable oil for 1-2 minutes per side after shaping. Store shaped onigiri in an airtight container with a damp paper towel to keep them soft. Freeze extras for up to 1 month—just steam from frozen for 5 minutes. The filling can be prepped ahead and stored for 2 days in the fridge, saving you time on assembly day.
Why You'll Love This Recipe
- No Rice Cooker Needed: I’ll admit, I used to avoid onigiri because I thought I needed a fancy rice cooker. Then I realized you can steam the rice in a pot with a lid—same fluffy texture, zero extra gadgets. The vinegar and salt give that bright, clean flavor that makes it taste fresh even if you’re using day-old rice.
- Spam Magic: Here’s what sold me—Spam’s salty, smoky bite cuts through the soft rice and scrambled egg like a boss. No fancy seasoning required; just slice it thin, mix in a beaten egg, and the umami explosion happens naturally. My picky eaters actually finish these first.
- Lunchbox Hero: Between us, these are my go-to for school lunches or workdays. Wrap them in plastic wrap, and they stay intact for hours. The egg keeps them moist, and the rice vinegar gives a little tang that wakes up even a sad office salad. I’ve sent these in a thermos too—no soggy rice in sight.
- Pantry Staple Power: Honestly, this recipe is my budget-friendly savior. You’re using rice, vinegar, and Spam—ingredients that last forever. Double the batch, freeze half, and you’ve got a 30-second meal later. Even my college-student nephew makes these when his wallet’s empty.
Step-by-step instructions for Spam and egg onigiri
Here's how to make perfectly shaped, flavorful onigiri every time.
Cook the Short-Grain Japanese Rice
Rinse the 3 cups of short-grain Japanese rice in a fine-mesh strainer until the water runs completely clear. This removes excess starch that can make your onigiri gummy. Combine the rinsed rice with the 2.75 cups of water, 0.05 cup of rice vinegar, and 0.5 tsp of lemon juice in a rice cooker or pot. Cook according to package instructions until fully tender and fluffy.
Once cooked, transfer the rice to a large mixing bowl and let it cool slightly while you prepare the filling. The rice should be warm but not hot to the touch—this makes it easier to shape without sticking. Here's the thing: freshly cooked rice holds its shape better, but it shouldn't be steaming when you start shaping. If it's too hot, let it sit uncovered for 5 minutes to cool just enough.
Prepare the Spam and Egg Filling
Dice the 1 can of Spam into ½-inch cubes and set aside. In a non-stick skillet, heat the 1 tbsp of vegetable oil over medium heat. Add the Spam and cook for 2-3 minutes until lightly browned. Remove from the pan and set aside.
In the same skillet, scramble the 4 whole large eggs until just set but still slightly moist. Stir in the 0.05 cup of soy sauce and 0.5 tsp of granulated sugar. Combine with the cooked Spam and let cool completely. The filling should be warm but not hot when you mix it with the rice—this prevents the onigiri from becoming too soft and falling apart.
Mix and Shape the Onigiri
Once the rice has cooled slightly and the filling is ready, add the Spam and egg mixture to the rice. Using a silicone spatula, gently fold everything together until the filling is evenly distributed. The mixture should be cohesive but not sticky—if it's too dry, add 1-2 teaspoons of water and mix again.
Wet your hands thoroughly with water and rub them with a tiny bit of vegetable oil to prevent sticking. Scoop about ½ cup of the rice mixture and gently press it into a triangular shape, tapering slightly toward the top. Here's the trick: use your dominant hand to shape while your other hand supports the base to prevent flattening. The goal is a compact, handheld shape that won't fall apart when you pick it up.
Season and Serve
Place the shaped onigiri on a plate lined with parchment paper. Sprinkle each one with a pinch of the 0.25 cup of furikake seasoning and the 0.5 tbsp of toasted sesame seeds. For extra flavor, you can also drizzle a tiny bit of soy sauce over the top, but don't overdo it—you want the seasoning to complement, not overwhelm.
Serve immediately while the onigiri are still warm. The texture should be firm but tender, with a perfect balance of fluffy rice and savory filling. If you're making these ahead of time, store them in an airtight container with a damp paper towel to keep them moist, and reheat in a steamer for 2-3 minutes before serving. The secret to perfect onigiri lies in the shaping—take your time, and don't rush the process.
Pro Tips For Making Spam And Egg Onigiri
- CHOP SPAM THIN: I learned this the hard way—thick slices of Spam stay greasy and chewy. Slice it paper-thin (about 1/8-inch) before cooking, so it crisps up fast and absorbs the rice’s moisture. Use a sharp knife or mandoline if you’re impatient like me—just don’t skip this step.
- COOK RICE TO 90% DONENESS: The rice needs to be almost done before shaping—about 90% cooked. Overcooked rice turns mushy when you add the filling, and undercooked rice won’t hold its shape. Test by fluffing a spoonful: grains should be tender but still slightly firm.
- SALT THE RICE VINEGAR: Plain rice vinegar tastes flat in onigiri. Mix in a pinch of salt (about 1/4 tsp per tablespoon of vinegar) before drizzling over the rice. It brightens the flavor and cuts through the richness of the Spam and egg—trust me, it’s the thing that matters most.
- WRAP TIGHTLY IN PLASTIC: Does it look weird? Yes. Does it work? Every single time. Wrap the shaped onigiri in plastic wrap and press firmly to seal out air. This keeps them from drying out while you cook the filling—no soggy rice, no crumbling. Refrigerate for at least 30 minutes before frying for extra stability.
Flavor customization for this recipe
Spicy Mayo Twist
For a kick, mix 2 tbsp mayonnaise with 1 tsp sriracha and ½ tsp honey to create a spicy mayo drizzle. Brush this onto the shaped onigiri before grilling or sprinkle it over the top after serving.
The heat from the sriracha pairs beautifully with the salty Spam and creamy eggs, adding a tangy contrast that keeps every bite exciting. 🌶️
Miso-Glazed Crisp
Dissolve 1 tbsp white miso paste in 1 tsp water to create a glaze. Brush this onto the shaped onigiri before pan-frying for a crispy exterior with deep umami flavor.
The miso caramelizes beautifully, creating a glossy finish that adds complexity to the dish. This works especially well if you're serving them warm or at room temperature.
Seafood Fusion
Swap the Spam for ½ cup cooked shrimp or ½ cup canned tuna, mixed with 1 tbsp soy sauce and ½ tsp sugar. The seafood keeps the filling light and fluffy while adding a briny depth.
For extra richness, stir in 1 tbsp cream cheese with the eggs. This variation is perfect for a lighter lunch option that still delivers big flavor.
Sweet and Savory
Add 1 tbsp teriyaki sauce to the filling mixture for a sweet-savory balance. The teriyaki complements the Spam and eggs beautifully, creating a caramelized flavor that enhances every bite.
For an extra touch, drizzle a little more teriyaki over the top before serving. This variation is especially popular for breakfast or brunch.
Herb-Infused Freshness
Stir 1 tbsp finely chopped green onions and 1 tsp chopped cilantro into the filling for a fresh, herbaceous twist. The bright flavors cut through the richness of the Spam and eggs, adding a vibrant contrast.
This variation works well if you're serving the onigiri as part of a larger bento box with other fresh ingredients like cucumber or edamame. 🌿
Smoky BBQ Option
Replace the soy sauce in the filling with 2 tbsp BBQ sauce (like Sweet Baby Ray's) and add ½ tsp smoked paprika for a smoky, sweet flavor profile. The BBQ sauce adds a tangy depth that pairs wonderfully with the Spam and eggs.
This version is ideal for those who love bold, smoky flavors and want a unique twist on the classic onigiri.
Nutrition facts
Frequently asked questions
Can I make these onigiri without rice vinegar?
Yes, but the flavor won't be quite the same. Apple cider vinegar works in a pinch—use the same amount—but it lacks the delicate sweetness of rice vinegar. For best results, try a mix of ¼ cup apple cider vinegar and ¼ cup water to mimic the balance. The vinegar helps tenderize the rice and adds that signature tangy brightness.
How do I keep my onigiri from falling apart when I shape them?
Use warm (not hot) rice that's been cooled just enough to handle, and keep your hands damp with water and lightly oiled. Press firmly but gently—think of it like sculpting clay. If the rice is too dry, add 1-2 teaspoons of water while mixing. The key is patience: shape them slowly and avoid over-handling.
Can I grill these onigiri instead of steaming?
Grilling gives them a delicious crispy exterior. Lightly oil a grill pan or outdoor grill, then cook for 2-3 minutes per side until golden brown. For extra flavor, brush with a little soy sauce before grilling. Just be careful not to overcook—the inside should stay soft and fluffy.
What's the best way to store leftover onigiri?
Keep them in an airtight container with a damp paper towel to prevent drying. They'll stay fresh for 2 days in the fridge. To reheat, steam for 2-3 minutes or microwave for 30 seconds (covered with a damp towel). Avoid freezing—it makes the rice too soft when thawed. For longer storage, shape them and freeze uncooked, then steam from frozen for 5 minutes.
How do I make these vegetarian?
Swap the Spam for ½ cup marinated tofu cubes (pressed and baked) or ½ cup canned mushrooms. For extra richness, add 1 tbsp cream cheese to the egg mixture. Keep the soy sauce and sugar amounts the same—they'll still give that savory depth. The texture will be slightly lighter but just as satisfying!