Japanese Pancakes

Name: Japanese Pancakes
Prep time: 20 min
Cook time: 12 min
Total time: 32 min
Cuisine: Asian, Japanese
Ingredients: 3 large egg yolks; 2 tablespoons milk; 2 teaspoons vegetable oil (or olive oil); 1 teaspoon vanilla extract; 1/8 teaspoon salt; 1/2 cup all-purpose flour*; 4 large egg whites (no yolk traces); 3 tablespoons Imperial Sugar Extra Fine Granulated Sugar; 1/2 teaspoon vinegar; Maple syrup, as needed; Butter, as needed