Nothing beats a homemade cake in terms of taste, but it can be hard to achieve that perfect, shiny finish. To give your buttercream a glossy, glamorous look, you'll need to grab your hairdryer.
The above Instagram video shows you how it's done, but it's really just as simple as blow-drying your frosted cake (I would start with the low setting) until the frosting goes from matte to shiny. It only takes a couple of minutes, and it makes for a very impressive presentation.
How to Make Frosting Look Glamorous [America's Test Kitchen]