How to Get Sharp Buttercream Edges with Homemade Buttercream
Sharp buttercream edges come from a stable frosting, a chilled cake, and patient smoothing, not from special equipment. With enough buttercream, a crumb coat, and careful temperature control, even homemade frosting can hold clean, square lines.
Essential Concepts
Stable buttercream
Chilled cake
Crumb coat
Enough frosting
Firm, not warm
Slow, steady scraping