This sandwich is, of course, in very dubious taste. But exercising dubious taste is all part of the whimsical hungover experience. And, anyway, this post-modern hymn to American excess between two slices of bread, this portion of rock and roll history, this hearty helping of artery-clogging flimflam, is far more than a mere sandwich — it is a legend.
Thickly spread each slice of bread with the peanut butter. Cover the peanut butter with the mashed banana and drizzle with honey.
Grill the bacon until crispy then place atop the sandwiches, 4 slices on each piece of bread. Top each sandwich with a second slice of bread. For extra calorific value (and authenticity), carefully fry each sandwich in butter, if desired.
If this sandwich becomes a habit, get friendly with a cardiac surgeon. You may need one.