This is a CloudyMutherChucker recipe, little high on the %'s and I would leave out the sweetener but try as is. There are a lot of versions on ELR.
@Skeebo do you have your own?
Banana Moon Pie -
6% Banana Cream TPA
1% Graham Cracker CAP (I would sub)
3% Marshmallow FA
3% Sugar Cookie V1 CAP
1% Super Sweet CAP (I would omit)
The banana cream pie I have used a couple time was very high % flavoring, 18.5, and was great when I started DIY a few years ago but I don't know anymore...
You can find it as a public recipe on ELR under my name, Banana Cream Pie, but I did steal it from another recipe on the site.