Step 1

Preheat the oven to 350F. Spray bread pans with non-stick spray or line with tinfoil.

Step 2

In the bowl of a stand mixer with a paddle attachment, beat together the butter and 2 cups sugar until light and fluffy.

Step 3

Add the eggs and vanilla extract. Combine until mixed well, scraping down the sides as needed.

Step 4

Add the flour, buttermilk, and baking soda slowly as the mixer spins so as not to spread flour everywhere.

Step 5

Pour 1/4 of the batter into 2 bread pans.

Step 6

Mix the 1/3 cup of sugar with the 2 teaspoons of cinnamon.

Step 7

Sprinkle 1/4 of the mixture on top of the batter in the bread pans.

Step 8

Divide the remaining batter between the two bread pans and top with remaining cinnamon-sugar mixture.

Step 9

Use a toothpick or knife to create swirls on the top.

Step 10

Bake for 50-60 minutes, or until a toothpick comes out clean when inserted into the center.

Step 11

Allow the bread to rest on a cooling sheet in the bread pans for about 20 minutes.

Step 12

Rmove the bread from the pan and allow to cool fully.