Mile-High Chocolate Cake with Vanilla Buttercream

The attraction of mile-high desserts is undeniable. Unfortunately, the taste doesn't always pay off. Sometimes there is an imbalance in the layering (too much filling, too much frosting), so we tried to balance this version flavor wise while still making it look delicious. The base is a chocolate cake we use regularly at the bakery; we filled it with a not-too-sweet buttercream. A cake this tall covered in white frosting would be too sweet, so instead we added a chocolate glaze that drips d...