Homemade Banana Pudding Cookies

Soft and Chewy Banana Pudding Cookies Bursting with Flavor
1/2 cup unsalted butter, softened
3/4 cup granulated sugar
1 egg
1 teaspoon vanilla extract
2 ripe bananas, mashed
2 cups all-purpose flour
1 package (3.4 oz) instant banana pudding mix
1/2 teaspoon baking soda
1/4 teaspoon salt
2 cups white chocolate chips
1 cup vanilla wafer crumbs