Sour Cream-Streusel Coffee Cake Recipe

Ingredients

• 1 1/4 cups coarsely chopped walnuts
• 1 1/4 cups packed brown sugar
• 5 teaspoons cinnamon
• 5 teaspoons unsweetened cocoa powder
• 6 tablespoons dried currants
• 3 cups flour
• 1 1/2 teaspoons baking soda
• 1 1/2 teaspoons baking powder
• 3/4 teaspoon salt
• 3/4 cup butter, at room temp
• 1 1/2 cups sugar
• 3 large eggs
• 1 tablespoon pure vanilla extract
• 1 (16 ounce) container sour cream (not low fat)
• 1 cup powdered sugar
• 1 tablespoon milk
• 1/4 cup chopped walnuts