This one uses the store-bought frosting that typically approximates airy buttercream and microwaves it to more closely ... but with minimal effort, microwaved Pillsbury is a decently effective cheat ...

Pillsbury Two Layer Size Double Dutch Fudge Buttercream Frosting Mix. In the decades since, legions of home cooks have attempted to replicate the gooey delights of the Tunnel of Fudge, with little ...