Mash 3 bananas with a fork. Slice remaining banana and set aside.

Combine cream cheese and sweetened condensed milk in a large bowl and mix until fluffy.  Fold in mashed bananas.

Place heavy whipping cream in the bowl of a stand mixer and mix until stiff peaks form.  Fold in vanilla extract. 

Fold in whipped cream mixture to banana mixture.  Refrigerate for 20 minutes.

To assemble:

Layer crushed cookies and banana cream mixture in parfait cups or tall glasses.  Repeat until all banana cream and cookies are used. Decorate with sliced bananas, crushed cookies and a 1-2 cookies.