Agatha's Oversized Cinnamon Rolls

Details

Ingredients

• 3 ¾ cups all-purpose flour, divided
• ½ cup white sugar
• 1 (.25 ounce) package active dry yeast
• ½ teaspoon kosher salt
• 1 cup milk
• ¼ cup unsalted butter, cut into chunks
• 1 egg, at room temperature
• ½ cup packed light brown sugar
• 1 ½ teaspoons ground cinnamon
• ¼ cup unsalted butter, softened
• ½ cup chopped walnuts
• ½ cup raisins
• 1 cup confectioners' sugar
• 4 teaspoons water, or more if needed