Graham Streusel Coffee Cake

" A graham cracker and nut streusel swirls through this quick, cake mix fix-up.  This is wonderful with a cup of hot tea! "

Ingredients
1 1/3 cups graham cracker crumbs
3/4 cup chopped walnuts 
3/4 cup packed brown sugar 
1 1/2 teaspoons ground cinnamon 
2/3 cup butter, melted 
1 (18.5 ounce) package yellow cake mix 
1 cup water 
1/4 cup vegetable oil 
3 eggs 
1 cup confectioners' sugar
  1 1/2 teaspoons vanilla extract 
1/2 teaspoon butter flavored extract (optional)

Directions
1.  Preheat oven to 350 degrees F (175 degrees C).
Grease a 9x13 inch pan.
Make the streusel:
In a medium bowl, combine the graham cracker crumbs, nuts, brown sugar and cinnamon.
Stir in the melted butter.
Set aside.
2.  In a large mixing bowl, combine the cake mix, water, oil, and eggs.
Beat on low speed with an electric mixer just until moistened.
Beat on medium speed for 2 minutes longer.
Spread 1/2 of the batter into a greased 9x13 inch pan.
Sprinkle on 1/2 of the streusel mixture.
Carefully spread the remaining 1/2 of the cake batter over the streusel, and sprinkle with the remaining streusel.
3.  Bake for 35 to 40 minutes or until a toothpick inserted comes out clean.
Cool slightly, then drizzle with the powdered sugar icing.
Best if served warm.
Makes 12 to 16 servings.
4.  To make the Icing:
In a small bowl, combine confectioners sugar with vanilla and butter flavoring. Add a few drops of water until you achieve drizzling consistency.
Makes 1 - 9x13 inch cake