Preheat your oven to 350°F (175°C). Grease the loaf pan.

In a mixing bowl, cream together the softened butter and sugar until light and fluffy. Beat in the eggs one at a time, then stir in the vanilla extract.

Mix in the buttermilk, flour, and baking soda until well combined.

In a separate bowl, mix the cinnamon and sugar for the topping.

Pour half of the batter into the prepared loaf pan. Sprinkle half of the cinnamon-sugar mixture over it. Pour the remaining batter and top with the rest of the cinnamon-sugar mixture.

Bake for 60 minutes or until a toothpick inserted into the center comes out clean.

Let the bread cool in the pan for 10 minutes before transferring it to a wire rack.