Mega Stuffed Peanut Butter Cups

chocolate candy coating

unsalted butter (at room temperature)

creamy peanut butter ((1 cup))

powdered sugar ((1 ½ cups))

vanilla extract

salt

milk ((¼ cup))

vanilla wafer cookie crumbs (about ¾ cup finely crushed crumbs)

assorted mix-ins: (chopped cookies, sprinkles, potato chips, pretzels, or whatever else you’d like!)