Yeasted Doughnuts with Coffee Frosting | America's Test Kitchen

Ingredients

• 4 1/2 cups (22½ ounces/638 grams) all-purpose flour
• 1/2 cup (3½ ounces/99 grams) granulated sugar
• 1 teaspoon instant or rapid-rise yeast
• 1 1/2 cups milk
• 1 large egg
• 1 1/2 teaspoons table salt
• 8 tablespoons unsalted butter, cut into ½-inch pieces and softened
• 2 quarts vegetable oil for frying
• 2 cups (8 ounces/227 grams) confectioners' sugar
• 1 tablespoon instant espresso powder
• Pinch table salt
• 1/4 cup hot water