Coffee Cake with Cinnamon Crumb - Recipe Tweets

Ingredients

• 2/3 cup packed light or dark brown sugar
• 3/4 cup all-purpose flour
• 2 1/2 teaspoons ground cinnamon
• 6 Tablespoons unsalted butter, chilled and cubed
• 1 teaspoon baking powder
• 1/4 teaspoon baking soda
• 1/4 teaspoon salt
• 1/2 cup unsalted butter, softened
• 3/4 cup granulated sugar
• 2 large eggs, at room temperature
• 2 teaspoons pure vanilla extract
• 1/2 cup sour cream, at room temperature
• 2 Tablespoons milk
• 1 cup confectioners' sugar