In the bowl of a stand mixer fitted with paddle attachment, cream together the room temperature butter, light brown sugar and granulated sugar on medium speed for 2 - 3 minutes or until the butter and sugars are well combined. On low, cream in the banana pudding mix, eggs, vanilla extract and crushed nilla wafer cookies until smooth and well combined.
¾ cup (170 g) unsalted butter, room temperature , ¾ cup (150 g) light brown sugar, ¼ cup (50 g) granulated sugar, 1 3.4 oz. instant banana pudding mix, 2 large eggs, room temperature, 2 teaspoons(10 ml) vanilla extract , ½ cup (50 g) finely crushed Nilla wafer cookies