Bring broth and 3/4 cup green onions to a boil in a large pot over medium-high heat.
Stir together 1/3 cup cold water, cornstarch, soy sauce, sugar, and salt in a small bowl until smooth. Stir cornstarch mixture into broth; boil, stirring, 1 minute.
Reduce heat to low.
Beat eggs with remaining 2 Tbsp. cold water in a bowl. Pour egg mixture into soup; cook, stirring with a fork, until eggs are opaque, about 1 minute.
Garnish with remaining 1/4 cup green onion.
6 servings
1 1/4 cup
* The % Daily Value (DV) tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.