Amish Graham Streusel Cake

1 (18.25 ounce) box cake mix (any kind)
1 package graham crackers
3/4 cup brown sugar
1/2 cup (1 stick) butter, melted
2 teaspoons cinnamon
1 cup confectioners' sugar
Water

Mix cake by following instructions on box.

Crush graham crackers. Add brown sugar, butter and cinnamon. Pour half of cake batter into pan, then half of the graham cracker crumbs. Pour remaining batter in, then follow with remaining crumbs. Bake at 375 degrees F until done.

Mix confectioners' sugar and water and drizzle over top of cake when done baking.