In a saucepan, heat ½ cup of heavy cream over medium heat until it is warm. Do not allow it to boil.
While your cream is heating, in a mixing bowl, add egg yolks and granulated sugar. Whisk until your eggs become a light yellow and your mixture is fluffy.
Remove your cream from the heat and pour into your mixing bowl. Whisk together on low, until combined. Pour your entire mixture back into the saucepan.
Place saucepan over medium heat and whisk until your mixture thickens. Your mixture must also reach 160°F. Once your mixture thickens, remove it from the burner.
Add in sea salt, vanilla extract, instant vanilla pudding mix, cinnamon, and ripe bananas. Whisk to combine.
In a separate mixing bowl, pour in your 1 ½ cup remaining heavy cream. Whisk on high until stiff peaks form. Add powdered sugar and whisk to combine.
Add your banana mixture to your whipped cream and whisk on low, to combine.
Next, in your serving dish, create layers of cool whip, banana pudding, and vanilla wafers. Refrigerate until chilled, serve on the same day and enjoy!