Add pudding mix to the same bowl, and beat again until all the lumps are gone. Refrigerate while you prepare the heavy cream. (This mixture will thicken)
1 (5 ounce) package instant vanilla pudding mix
When ready to assemble, beat the heavy cream in a large bowl until stiff peaks form. Add half of the whipped cream to the pudding mixture, and beat until the mixture is fluffy and fully blended.
3 cups heavy cream
Assemble: Add a layer of Nila wafers to the bottom of a trifle bowl followed by a layer of sliced bananas. Pour about 1/3 of the pudding mixture on top. 1/3 of the whipped cream, and keep repeating the layers! Mound the top with more mini Nila (or crushed) wafers and sliced bananas. (this can also be assembled in a 12x8 casserole dish.)
20 ounces (~1.5 boxes) mini Nila Wafers, 5-7 ripe bananas
Cover and refrigerate for at least 6 hours or overnight!
Notes
Tip: Do not add bananas to the top layer until you are ready to serve, otherwise they will brown too fast