Bath Buns

Name: Bath Buns
Cuisine: American
Ingredients: 1/4 cup warm water; 2 1/4 teaspoons (1 packet) active dry yeast; 1 tablespoon granulated sugar; 1/2 cup whole milk; 2 tablespoons (1/4 stick) butter; 2 1/2 cups all-purpose flour; 6 tablespoons granulated sugar; 1 teaspoons salt; 2 large eggs, at room tempature; Grated zest if 1 lemon; Grated zest of 1 orange; 3/4 cup dried currants or dried sweetened cranberries; 1 teaspoon caraway seeds; 1 egg beaten, for brushing over the buns; Turbinado sugar, for sprinkling (Indroduction); with 1 tablespoon water, for brushing over the buns