Apple Streusel Coffee Cake | Wolf Gourmet

Ingredients

• ½ cup all-purpose flour
• ¼ cup old fashioned oats
• ¼ cup packed dark brown sugar
• ½ teaspoon ground cinnamon
• ¼ teaspoon salt
• 4 tablespoons unsalted butter, room temperature, cut into small pieces
• 1¾ cups all-purpose flour
• 1½ teaspoons baking powder
• 1½ teaspoons ground cinnamon
• ¼ teaspoon baking soda
• 1 medium (6 ounces) Granny Smith apple, peeled and diced
• ½ cup chopped pecans
• ½ cup dried currants
• ¾ cup packed light brown sugar
• ½ cup granulated sugar
• 8 tablespoons unsalted butter, softened
• 2 large eggs
• 2 teaspoons vanilla extract
• ½ cup sour cream
• ¼ cup confectioners’ sugar
• 1 tablespoon milk
• ¼ teaspoon ground cinnamon