1. Preheat the oven to 350°F and grease a standard 9×5-inch loaf pan. Line with parchment paper if desired.

2. In a medium bowl, whisk together the flour, baking powder, and salt.

3. In a large bowl, beat the softened butter and granulated sugar until light and fluffy.

4. Add the eggs one at a time, mixing well after each one, then mix in the vanilla extract.

5. Add the dry ingredients in batches, alternating with the milk, and mix just until combined.

6. Pour the batter into the prepared loaf pan and smooth the top.

7. Bake for 45 to 55 minutes, or until a toothpick inserted in the center comes out with a few moist crumbs.

8. Cool the loaf in the pan for 10 to 15 minutes, then transfer to a wire rack.

9. Whisk together the powdered sugar, cinnamon, and 2 to 3 tablespoons heavy cream or milk until smooth.

10. Spoon the glaze over the mostly cooled loaf, let it set, then slice and serve.