Makeover Crumb Coffee Cake Recipe

In a large bowl, beat butter, sugar and sugar blend on medium speed for 2 minutes or until crumbly. Beat in the eggs, applesauce, oil, vanilla and butter flavoring. Combine flour, baking powder, baking soda and salt; add to butter mixture alternately with sour cream. Pour half of the batter into a 13-in. x 9-in. baking pan coated with cooking spray. Combine filling ingredients; sprinkle over batter. Carefully top with remaining batter. For topping, combine the flour, sugars and cinnamon in a bowl; cut in butter until crumbly. Stir in walnuts. Sprinkle over batter. Bake at 350 ° for 25-30 minutes or until a toothpick inserted near the center comes out clean. Cool on a wire rack. Combine icing ingredients until smooth; drizzle over coffee cake.