- Prepare the tempura: In a bowl, mix the tempura batter mix, cold water and egg to make the batter. Heat vegetable oil in a pot over medium-high heat. Dip the shrimp into the batter and fry them for 2-3 minutes until golden and crispy. Set aside on towel to drain excess oil.
- Prepare the broth: In a medium pot, bring 4 cups of water to a simmer. Add 4 tablespoons of hontsuyu, soy sauce, and sugar. Stir and let it simmer for 2-3 mins. Taste and adjust the seasoning as needed.
- Cook the udon: in another pot, cook the udon noodles according to the package instructions. Once cooked, drain and set aside.
- Assemble the soup. Divide the cooked udon noodles into bowls. Pour the hot hontsuyu broth over the noodles. Top each bowl with the store-bought fried shrimp and garnish with chopped green onions.


