01 -
In a large bowl, whisk together sweetened condensed milk and ice-cold water until fully combined. Add instant vanilla pudding mix and whisk vigorously until the mixture is smooth and lump-free. Cover and refrigerate for 4 hours or until set.
02 -
In a separate large bowl, whip heavy cream on medium speed until soft peaks form. Add marshmallow fluff and continue whipping until stiff peaks are achieved.
03 -
Gently fold whipped cream mixture into the chilled pudding in several portions, mixing carefully to avoid deflating the cream. Stir only until streaks are minimal.
04 -
Arrange a layer of Nilla wafers at the bottom of a 23x33 cm baking dish or large bowl. Add a layer of banana slices over the wafers, then spread one-third of the cream mixture evenly on top. Repeat the layering process twice more, finishing with a layer of cream.
05 -
Decorate the top layer as desired, such as sprinkling crushed Nilla wafers. Cover and refrigerate for at least 4 hours before serving.