Directions
Lightly grease the bottom and sides of a 4- to 6-quart slow cooker with nonstick spray or a thin layer of butter to help prevent sticking.
Arrange a single, even layer of chocolate sandwich cookies on the bottom of the slow cooker insert, placing them close together so most of the surface is covered. It’s okay if a few overlap slightly or you need to break a couple to fill gaps.
In a medium bowl, gently fold the sweetened condensed milk into the whipped topping until the mixture is mostly smooth and evenly combined. Don’t overmix; you want to keep some lightness from the whipped topping.
Pour about half of the whipped topping mixture evenly over the layer of cookies in the slow cooker, using a spatula to spread it all the way to the edges so the cookies are mostly covered.
Add a second layer of chocolate sandwich cookies on top of the cream mixture, again arranging them in a single layer and filling in gaps with broken pieces as needed.
Pour the remaining whipped topping and condensed milk mixture over the second cookie layer, spreading it gently to cover the cookies. The cookies don’t have to be fully submerged; they’ll soften as they cook.
Cover the slow cooker with the lid. Cook on LOW for 2 to 2 1/2 hours, until the edges are set and the center is hot and bubbly. The cookies will soften and the mixture will thicken into a scoopable, cake-like dessert.
Turn off the slow cooker and let the dessert sit, covered, for 10 to 15 minutes to set slightly. This rest time makes it easier to scoop.
Scoop the warm cookies and cream cake into bowls and serve immediately. Store any leftovers covered in the refrigerator for up to 3 days; reheat individual portions in the microwave for 20 to 30 seconds before serving.
Variations & Tips
For a richer chocolate flavor, use chocolate-filled sandwich cookies or add a small handful of chocolate chips between the cookie layers (this technically adds a fourth ingredient, but it’s a fun upgrade for chocoholics). If you prefer things less sweet, use reduced-fat or thin-style chocolate sandwich cookies and swap half of the sweetened condensed milk for regular milk or half-and-half. To make it feel extra special for the grandkids, top each bowl with colorful sprinkles or crushed cookies right before serving. You can also turn this into a sundae bar: keep the slow cooker on WARM and set out toppings like mini marshmallows, chopped nuts, and chocolate syrup so everyone can customize their own bowl. For a lighter twist, use light whipped topping and reduced-fat sweetened condensed milk if available. If your slow cooker runs hot, start checking at the 1 hour 45 minute mark so the edges don’t overcook; every slow cooker is a little different, so the first time you make it, keep an eye on it. To prevent sticking even more and make cleanup easier, line the bottom of the slow cooker with a parchment paper circle before arranging the cookies.
