Prep Your Ingredients: Measure everything before starting. Sift the powdered sugar to avoid lumps. Ensure cream cheese and butter are truly soft if making the cream cheese version.
Choose Your Base: Decide between classic vanilla or cream cheese icing.
The method is similar, but the order matters for the cream cheese version.
Make Classic Vanilla Icing: In a medium bowl, whisk powdered sugar, melted butter, vanilla, and salt. Add milk 1 tablespoon at a time until the icing is smooth and pourable but not watery. Aim for a consistency that ribbons off the whisk.
Make Cream Cheese Icing: In a bowl, beat the softened cream cheese and butter together until smooth and fluffy, about 1–2 minutes.
Add the vanilla and salt. Mix in powdered sugar gradually, then add milk a teaspoon at a time until you reach a thick, spreadable glaze.
Taste and Tweak: Adjust sweetness, salt, or vanilla. Add any flavor boosters now.
A pinch of salt can transform a too-sweet icing into something balanced and bakery-like.
Check the Texture: For drizzling, thin with a touch more milk. For spreading, keep it thicker. You want the icing to coat the back of a spoon and slowly run off, not puddle.
Ice at the Right Time: Let cinnamon buns cool for 5–10 minutes out of the oven.
They should be warm but not steaming hot. Warm buns help the icing melt into the swirls without sliding right off.
Apply Generously: Spoon or drizzle the icing over the buns. For cream cheese icing, use an offset spatula to nudge it into the nooks and seams.
Let It Set (Briefly): Give the icing a few minutes to settle and gloss over. If you like extra icing, add a second thin layer once the first has set slightly.
Serve Fresh: Enjoy while the buns are still warm.
The icing will be velvety and aromatic, just as it should be.