I think this is canon now, but "banana muffin" is one of Clark's pet name for Bruce, Clark will someday think of something less awkward (and something Bruce doesn't twist his face to), but for now...
I personally hate it when I can see Bruce’s eyes through the cowl BUT THAT DAMN EXPRESSION IS JUST SO FUCKING DONE WITH CLARK’S SHIT FOR THE DAY
“You could f through of anything, Clark. ANYTHING!!!!! and you choose Banana Muffin. Christ, you are your mother’s son.”
And poor Clark is like
( ´•̥̥̥ω•̥̥̥` )