In a metal loaf pan, add melted butter, brown sugar and cinnamon and whisk until combined.
Add the buns in one layer in no particular fashion, the messier the better!
Cover the pan with a damp towel and let it proof and rise for 1 hour.
Bake in the oven at 425°F for 30 to 32 minutes.
While the loaf is baking, make the orange glaze by combining the ingredients in a small bowl. Add orange juice or nondairy milk a bit at a time until you get a smooth, runny glaze that easily drizzles off a spoon.
Let the bread cool in the loaf pan for 10 minutes before removing. Since this is a bread loaf shape, I didn’t flip it upside down. If using, drizzle on the orange glaze and slice like bread to serve while still slightly warm.