Between the cinnamon sugar and the glaze, I’d say this bread is a little bit like cinnamon rolls in quick bread form—but unlike cinnamon rolls, there’s no yeast needed!
Combine the flour, a cup of sugar, baking soda, and salt in a large bowl. In a separate bowl, stir together the buttermilk, egg, and oil. Pour the wet ingredients into the dry ingredients and stir until just combined.
Cool the bread in the pan for 10 minutes, then remove it and let it finish cooling on a wire rack. Combine the confectioners’ sugar and milk in a small bowl and drizzle it over the loaf.