Super Cinnamon Ribbon Coffee Cake (adapted from Salt and Chocolate)
2 cups flour
1 teaspoon baking soda
1 teaspoon baking powder
1/2 teaspoon salt
1/4 cup butter at room temperature
1 cup granulated sugar
2 large eggs
1 tsp vanilla extract
1 cup buttermilk
1 cup brown sugar
2 heaping tablespoons ground cinnamon
1/2 tsp ground ginger
Preheat oven to 350 degrees and grease/line a 9x5 inch loaf pan. Whisk the flour, baking soda, baking powder, ginger, and salt together in a bowl and set aside. Stir the buttermilk and vanilla together in a large measuring cup or small bowl and set aside. Stir the brown sugar and cinnamon together in a bowl and set aside.
Cream the butter and granulated sugar together until fluffy. Add the eggs and vanilla, one at a time, mixing well between each. Add 1/3 of the flour mixture and mix till combined, followed by 1/2 of the buttermilk mixture. Repeat this process, mixing until just combined after each addition and end with the flour.
Pour 1/3 of the batter into the prepared pan and top with 1/3 of the cinnamon mixture and repeat until the final layer of cinnamon sugar becomes the topping. Bake for 50-60 minutes or until a toothpick inserted in the center comes out clean.