Mentaiko mayo onigiri is a quick Japanese rice ball recipe filled with spicy cod roe and creamy mayonnaise for a savory snack or easy lunch. This recipe uses warm short grain rice shaped around a filling made with mentaiko, Japanese mayonnaise, and optional seasonings such as soy sauce, sesame oil, green onion, or nori for extra aroma. The creamy filling adds briny seafood flavor, mild heat, and richness, while the rice keeps each bite soft and satisfying. A sheet of nori can be wrapped around the outside for crisp texture and classic onigiri flavor, or added just before serving to keep it fresh. The final rice balls come together in about ten minutes, making them practical for lunch boxes, quick meals, or Japanese-style snacks with a balanced mix of creamy, spicy, and savory flavor.
