Grandma's Buttermilk Coffee Cake

This is the best coffeecake i've ever had! so easy to make and always a hit. not sure if it is really grandma's recipe or if she got it somewhere.

Preheat oven to 350 degrees.

Mix flour , salt , and 1 / 2 teaspoon of cinnamon into a large mixing bowl.

Add sugar and oil and mix on medium speed until well blended and feathery.

Remove 3 / 4 cup of this mixture and put in a smaller mixing bowl for the topping.

Add walnuts and remainder of cinnamon to the contents of the smaller bowl for the topping , mix well and set aside for later.

To remaining mixture add baking soda , baking powder , egg and buttermilk.

Mix until smooth , this is the coffeecake batter.

Spoon the cake batter into a buttered 9 x 13 baking dish.

Sprinkle the topping over the cake batter and press lightly with fingers.

Bake at 350 degrees for 25 - 30 minutes.

vegetable oil, flour, salt, cinnamon, brown sugar, granulated sugar, baking soda, baking powder, buttermilk, egg, walnuts