01 -
Whisk the cold milk, sweetened condensed milk, and instant pudding mix in a large bowl for about 2 minutes, until smooth. Cover and refrigerate for at least 4 hours, or overnight.
02 -
Whisk the pumpkin puree, pumpkin pie spice, cinnamon, and salt into the chilled pudding base until evenly blended.
03 -
Beat the cold heavy cream, powdered sugar, and vanilla to stiff peaks. Reserve 1 cup of whipped cream for the top.
04 -
Gently fold the remaining whipped cream into the pumpkin pudding until no white streaks remain. Use a spatula and keep the mixture airy.
05 -
In a 9x13-inch dish or trifle bowl, layer half the gingersnaps, half the vanilla wafers, half the banana slices, and half the pumpkin pudding. Repeat the layers.
06 -
Spread the reserved whipped cream over the top. Cover and refrigerate for 1-2 hours, then sprinkle with crushed gingersnaps just before serving.