Preheat oven to 350�. Sift flour, cinnamon, soda and salt in medium bowl.
Cream butter and sugar in a large bowl. Add egg and mix until smooth. Add dry ingredients and buttermilk alternately to creamed mixture.
Pour batter into greased pan.
Topping: Mix flour and sugar. Cut into butter til crumbly. Works best if butter is VERY cold.
Sprinkle topping on batter.
Bake 40 to 45 minutes.