This slow cooker 4-ingredient banana pudding cake is the kind of nostalgic dessert that disappears in minutes at a summer barbecue. My aunt first brought a pan of this to our family cookout, and I watched grown adults hover by the dessert table until the very last crumb was gone. It has all the flavors of old-fashioned banana pudding—vanilla wafers, creamy pudding, and soft bananas—tucked under a fluffy yellow cake, but you make it right in the slow cooker so you’re not heating up the whole kitchen. It’s simple, cozy, and perfect for feeding a crowd with almost no effort.
Serve this warm right out of the slow cooker, scooped into bowls so you catch the pudding, cake, and banana pieces in every bite. It’s wonderful on its own, but a little whipped cream or a scoop of vanilla ice cream makes it extra special for guests. At a barbecue, I like to park the slow cooker on the counter with a stack of small bowls and spoons so people can help themselves after burgers and hot dogs. Coffee or iced tea on the side is perfect, and if you want to stretch it for a bigger crowd, set out some fresh berries for a bright, cool contrast.
Slow Cooker Banana Pudding CakeServings: 8-10
Ingredients
1 (15.25-ounce) box yellow cake mix
2 cups cold milk (whole or 2%)
1 (3.4-ounce) box instant vanilla pudding mix
4 large ripe but firm bananas, sliced 1/4 inch thick
Directions
Lightly coat the inside of a 4- to 6-quart slow cooker with nonstick cooking spray or a thin layer of butter to help prevent sticking and make cleanup easier.
In a medium bowl, whisk together the cold milk and instant vanilla pudding mix for about 2 minutes, until thickened and smooth. Set aside to continue thickening while you prep the cake layer.
In a large bowl, prepare the yellow cake mix according to the package directions using ONLY the ingredients listed on the box that are water-based (such as water) and omitting any extra add-ins like pudding; you want a standard pourable cake batter. Stir just until no dry pockets of mix remain.
Pour about half of the cake batter into the bottom of the greased slow cooker and spread it into an even layer with a spatula.
Arrange half of the banana slices evenly over the cake batter layer, keeping them mostly in a single layer so every scoop later has some soft banana pieces.
Gently spoon or pour the thickened vanilla pudding over the bananas, spreading it carefully so it covers the bananas in an even layer. Try not to mix it into the batter; you want distinct layers so you get that creamy pudding bite.
Arrange the remaining banana slices over the pudding layer in an even layer.
Carefully pour or spoon the remaining cake batter over the top, spreading gently with a spatula to cover the bananas and pudding. It’s okay if some pudding peeks through; as it cooks, the layers will mingle into a soft, spoonable cake.
Cover the slow cooker with its lid. Cook on HIGH for 2 to 2 1/2 hours, or on LOW for 4 hours, until the top of the cake is set and springs back lightly when touched in the center. The edges will pull slightly away from the sides, and you may see some bubbly pudding around the edges—that’s good.
Once cooked, turn off the slow cooker and let the cake sit, covered, for 15 to 20 minutes. This resting time helps the pudding thicken up a bit more and makes the scoops hold together better.
Serve the banana pudding cake warm, scooping down deep with a large spoon so each serving includes fluffy cake, creamy pudding, and soft banana slices. If you’d like, top with whipped cream or vanilla ice cream right before serving.
For a barbecue or potluck, switch the slow cooker to the WARM setting after the initial rest and keep it covered. Set out bowls and a serving spoon so guests can help themselves. Try to serve within 2 hours for the best texture and food safety.
Variations & Tips
For picky eaters, you can slice the bananas very thin so they almost melt into the pudding and cake; kids who “don’t like chunks” usually handle it better that way. If your family prefers a stronger banana flavor, use banana cream instant pudding instead of vanilla. For extra nostalgia, you can crumble a handful of vanilla wafer cookies over individual servings right before serving, but that would be an optional fifth ingredient so I keep it off the base recipe. If you want a slightly lighter dessert, use 2% milk and a light cake mix; the texture will still be soft and cozy. To make this more like a trifle for a special occasion, let the cake cool slightly, then layer scoops of it in a clear trifle bowl with whipped topping and extra banana slices. Food safety tips: Because this dessert contains dairy and fresh bananas, don’t leave it at room temperature for more than 2 hours (1 hour if it’s very hot outside at a barbecue). When you’re done serving, turn off the slow cooker, let the dessert cool, then transfer leftovers to shallow containers and refrigerate within 2 hours. Eat refrigerated leftovers within 2 days for best quality and to keep the bananas from getting overly brown and mushy. Reheat individual portions gently in the microwave until just warm, not hot, so the pudding doesn’t separate.
