Cinnamon Swirl Donut Bread in 60 Minutes

Instructions:

1. Preheat the oven to 350°F (175°C). Grease a 9x5 inch loaf pan and line it with parchment paper.
2. In a large bowl, whisk together the all-purpose flour, granulated sugar (150g), baking powder, and salt.
3. In a smaller bowl, beat the eggs, buttermilk, melted butter (115g), and vanilla extract until smooth.
4. Pour the wet ingredients into the dry ingredients and stir with a spatula until just combined, ensuring no flour streaks remain.
5. In a small ramekin, mix the brown sugar, cinnamon (8g), and melted butter (15g) into a thick paste.
6. Pour half of the batter into the prepared loaf pan. Dollop the cinnamon paste over the center, then top with the remaining batter.
7. Use a butter knife to gently swirl the cinnamon paste in a figure-eight motion.
8. Bake for 40–50 minutes, or until a toothpick inserted in the center comes out clean and the top is golden brown.
9. While the bread is still warm, brush the top with melted butter (30g) and immediately dredge it in a mixture of granulated sugar (50g) and cinnamon (3g).
10. Let the bread cool in the pan for 10 minutes before transferring to a wire rack.