Whisk together the sweetened condensed milk and the
peanut butter, then you'll add in the
remaining liquid ingredients and whisk until smooth.
The
peanut butter layer set into a strangely hard texture, and the jelly was so
liquid - y (didn't let it cool, see previous mention of not enough time) that when I put the
remaining banana bread batter on top, the jam oozed out all around the sides / top.