Instructions:

Preheat the oven to 350°F (175°C). Grease two 9×5-inch loaf pans.

Cream together butter, 2 cups sugar, and eggs. Add buttermilk, flour, and baking soda.

Pour half of the batter into the greased loaf pans (1/4 in each).

Mix the ingredients for the cinnamon sugar mixture in a bowl. Sprinkle 3/4 of the cinnamon mix on the batter in the pans.

Add the remaining batter and sprinkle with the rest of the cinnamon mix.