Preheat the oven to 375°F (190°C).
Roll out the crescent dough onto a baking sheet and press the seams together to form a single sheet.
Brush the entire surface with melted butter.
In a small bowl, mix sugar and cinnamon, then sprinkle evenly over the dough.
Bake for 10–12 minutes, until the edges are golden and your kitchen smells like heaven.
While it bakes, whisk together powdered sugar, milk, and vanilla until smooth.
Drizzle over the warm pizza. Slice, serve, and maybe hide a piece for yourself.