Cinnamon Streusel Muffin Cake

-  3 cups all-purpose flour, divided -  1/2 cup firmly packed brown sugar -  1/2 tsp. ground cinnamon -  1 cup (2 sticks) I Can't Believe It's Not Butter!® Sticks, divided -  2 tsp. baking powder -  1/2 tsp. salt -  1 cup granulated sugar -  2 large eggs -  1 tsp. vanilla extract -  1/2 cup milk

Preheat oven to 350°. Grease and line 9-inch round cake pan with waxed paper; set aside.

Combine 1 cup flour, brown sugar and cinnamon in medium bowl. Blend in 1/2 cup I Can't Believe It's Not Butter!® Sticks with pastry blender or two knives until coarse crumbs form; set aside.

Combine remaining 2 cups flour, baking powder and salt in medium bowl; set aside.

Beat remaining 1/2 cup Spread with granulated sugar in large bowl with electric mixer on medium speed until light and fluffy, about 2 minutes. Beat in eggs and vanilla until blended, scraping sides occasionally. Alternately beat in flour mixture and milk just until blended, beginning and ending with baking powder mixture. Evenly spoon 1/2 of the batter into prepared pan. then Sprinkle 1/2 of the streusel crumb mixture over batter. Spoon remaining batter into pan, then sprinkle with remaining streusel.

Bake 50 minutes or until toothpick inserted in center comes out clean. Cool 15 minutes on wire rack; carefully remove from pan and cool completely. Sprinkle, if desired, with confectioners sugar.