Preheat oven to 350°F, prep loaf pan with butter & parchment.
Zest and juice oranges. Set aside.
Whisk flour, baking powder, soda, and salt.
Mix butter and sugar until creamy. Add eggs, vanilla, zest, juice, and milk.
Fold wet into dry gently with spatula. Don’t overmix.
Pour batter into loaf pan, smooth top, tap twice.
Bake 50–60 min. Check doneness with toothpick.
Cool 15 min in pan, transfer to rack.
Mix glaze ingredients and drizzle over cooled bread.