These are a crispy, rich outragiously delicious cookies with a gooey middle!... or for a marbleized look, swirl the sticky part into the batter with a wooden spoon, if you prefer the gooey part distributed throughout the cookie. This is an amazing cookie recipe that every peanut butter lover should try! the gooey filling part of this recipe is made on a food processor. Yield is only estimated, depending on size of cookies. If you do not have any butter-flavour Crisco, then use 1/2 cup butter. Just a tip, you can freeze the remaining sweetened condensed milk for another time, but my advise is better prepare two recipes of these cookies, they won't last long LOL!...just prepare the same ingredients in two seperate bowls.