Heat oven to 350 degrees F. Grease a loaf pans.

Cinnamon-Sugar Mixture

1. In a small bowl mix the sugar and cinnamon; set aside.

Batter

1. Cream together butter, sugar, egg and vanilla extract (if using).
2. Add milk, flour and baking soda, and mix well.
3. Put 1/2 of batter (or a little less) into the prepared loaf pan.
4. Sprinkle 3/4 of Cinnamon-Sugar Mixture on top of the batter.
5. Add remaining batter to pan; sprinkle with remaining Cinnamon-Sugar Mixture. Swirl with a knife.
6. Bake for 45 to 50 minutes or until a wooden pick comes out clean.
7. Cool in pan for 20 minutes before removing from pan.