preheat the oven to a temperature of 350°. Then grease a 10 inch
tube pan lightly. Once that is done, take a large mixing bowl and cream
together the butter with 2 cups of sugar. When it turns fluffy, add the
eggs and vanilla one at a time taking care to beat the mixture well
after each egg is added.
Next mix the baking powder, baking
soda and flour. Now alternatively add the egg mixture and the sour
cream and beat. While doing so, beat only enough to keep the batter
smooth. Now combine the remaining sugar with cinnamon and walnuts.
the above steps are complete; spoon 1/3 of the batter into the prepared
pan. Then over it sprinkle 1/3 of the walnut mixture. Ensure you repeat
this layer 2 more times. Put this into the oven and bake it at 350° for 70 minutes. When itís done, let it cool in the pan for 10
minutes after which remove the pan and let the cinnamon coffee cake
continue to cool on a wire rack.