Chinese Sugar Donuts!

COOK TIME : 20 MINUTES SERVES: 15

• 1/2 cup milk
• 1 teaspoon dry yeast
• 1 Whole Egg
• 1 egg yolk
• 2 teaspoons sugar
• 1/2 teaspoon salt
• 2 cups all purpose flour
• 1 tablespoon butter
• Vegetable oil for frying
• 2 cups sugar; for dusting
• 1 tablespoon olive oil