Cinnamon Coffee Cake

I made this coffee cake recently for a ladies Bible study that I host at my house.  It turned out great and I plan on making this again.

1 cup butter, softened
2  3/4 cups sugar, divided
4 eggs
2 tsp. vanilla
3 cups flour
2 cups (16 oz) sour cream
2 Tbl. cinnamon

Directions:
In a large bowl, cream butter and 2 cups of sugar until fluffy. Add eggs one at a time, beating well after each addition.  Beat in vanilla.  Add flour and sour cream alternately, beating just enough after each addition to keep batter smooth.

Spoon one half of the batter into a greased 13 X 9 pan.  Combine cinnamon and remaining sugar; sprinkle over batter.  Add remaining batter and bake at 350 degrees for 50 minutes.