Hot Cross Buns

Name: Hot Cross Buns
Prep time: 20 min
Cook time: 20 min
Total time: 40 min
Cuisine: British
Ingredients: 3 cups all-purpose flour; 0.75 cup warm water (110 degrees F/45 degrees C); 0.25 cup white sugar; 1 large egg; 1 large eggs, separated, divided; 3 tablespoons butter, softened; 1 tablespoon active dry yeast; 1 tablespoon instant powdered milk; 0.375 teaspoon salt; 0.75 cup dried currants; 1 teaspoon ground cinnamon; 2 tablespoons water; 0.5 cup confectioners' sugar; 2 teaspoons milk; 0.25 teaspoon vanilla extract