Cinnamon Coffee Cake

Bahan-bahan (9 porsi)

• 1 ¾ cup all-purpose flour
• 1 cup granulated sugar
• ¼ teaspoon kosher salt
• 2 teaspoons baking powder
• ¼ cup unsalted butter (cubed)
• 1 large egg (beaten)
• ¾ cup whole milk
• 1 teaspoon vanilla extract
• 2 teaspoons cinnamon
• ¼ cup light brown sugar
• ¼ cup chopped walnuts (optional)
• 1 tablespoon water
• 6 tablespoons powdered sugar