In a large mixing bowl, combine warm milk, sugar, and yeast. Stir gently and let it sit for about 5-10 minutes until frothy.

Add flour, cinnamon, orange zest, melted butter, and beaten egg into the yeast mixture. Stir with a wooden spoon until a rough dough forms.

Transfer the dough to a floured surface and knead for 8-10 minutes until smooth and elastic.

Place the dough in a greased bowl, cover, and let it rise in a warm area for 1-2 hours, until doubled in size.

Gently punch down the risen dough, knead in raisins, then divide into 12 portions and shape into balls.

Cover the shaped buns with a towel and let them rise for another 30-45 minutes.

Preheat the oven to 375°F (190°C).

Bake the buns for 20 minutes or until golden brown and hollow when tapped.

Let cool for 5-10 minutes, then brush with glaze.