This slow cooker 6-ingredient pineapple upside down cake is my weeknight answer to a nostalgic classic with almost no effort. Instead of creaming butter or dirtying multiple bowls, we simply pour dry yellow cake mix straight over canned crushed pineapple and a quick brown sugar–butter layer right in the slow cooker. Pineapple upside down cake dates back to early 20th-century American baking, when canned pineapple became widely available and home cooks embraced “upside down” skillet cakes. Here, we bring that same caramelized fruit-and-cake idea into the slow cooker, which keeps the cake moist and hands-off—perfect for busy days in a Midwestern kitchen or anywhere you want a warm, spoonable dessert with minimal dishes.
Serve this cake warm, scooped straight from the slow cooker into shallow bowls. A scoop of vanilla ice cream or a dollop of lightly sweetened whipped cream plays beautifully against the tangy pineapple and butterscotch-like brown sugar. For a little texture, sprinkle with toasted coconut flakes or chopped toasted pecans just before serving. Coffee, black tea, or a simple glass of cold milk all make natural pairings, and if you’re entertaining, a small pour of dessert wine or a pineapple-forward rum cocktail echoes the flavors nicely.
Slow Cooker Pineapple Upside Down CakeServings: 8
Ingredients
1 can (20 ounces) crushed pineapple in juice, undrained
1 box (15.25 ounces) yellow cake mix, dry
1/2 cup (1 stick / 113 g) unsalted butter, melted
1/2 cup packed light brown sugar
2 large eggs
1/2 cup whole milk (or 2% milk)
Directions
Lightly grease the insert of a 4- to 6-quart slow cooker with nonstick cooking spray or a thin film of butter to help prevent sticking.
Pour the entire can of crushed pineapple, including all the juice, into the bottom of the slow cooker and spread it into an even layer with a spatula.
In a small bowl, stir together the melted butter and brown sugar until the sugar is evenly moistened. Drizzle this mixture over the pineapple and gently spread so it mostly covers the fruit; it will create a soft, caramel-like layer as it cooks.
In a medium bowl or large measuring cup, whisk the eggs and milk together until well combined.
Open the box of yellow cake mix and sprinkle the dry mix evenly over the pineapple and brown sugar layer in the slow cooker. You should clearly see the dry mix covering the fruit in a fairly even blanket—this is exactly what we want.
Slowly pour the egg-and-milk mixture evenly over the dry cake mix, trying to moisten as much of the surface as possible. Do not stir; the layers will settle and bake into a soft, upside down-style cake as it cooks.
Cover the slow cooker with its lid. Cook on HIGH for 2 to 2 1/2 hours, or on LOW for 4 to 4 1/2 hours, until the top looks set, the edges are pulling slightly away from the sides, and a toothpick inserted into the cake portion (avoiding the pineapple layer) comes out mostly clean.
Turn off the slow cooker and let the cake rest, covered, for 15 to 20 minutes. This helps the pineapple layer thicken slightly and makes the cake easier to scoop.
Serve the cake warm, spooning down through the cake to scoop up plenty of the pineapple and brown sugar from the bottom. If you like, top each serving with ice cream, whipped cream, or a sprinkle of toasted nuts or coconut.
Variations & Tips
For a more traditional pineapple upside down look, scatter a few drained pineapple rings and maraschino cherries over the crushed pineapple before adding the brown sugar–butter mixture. You can also fold 1/2 cup of chopped toasted pecans or walnuts into the pineapple layer for added crunch. If you prefer a richer cake, substitute half-and-half for the milk, or add 1 teaspoon of vanilla extract to the egg-and-milk mixture before pouring it over the dry cake mix. For a slightly boozy, grown-up version, splash 1 to 2 tablespoons of dark rum into the pineapple layer. To make this dairy-free, use a dairy-free margarine or coconut oil instead of butter and your favorite plant-based milk; just be sure the cake mix is dairy-free as well. Food safety tips: Keep the canned pineapple refrigerated after opening if you’re not using it immediately, and don’t leave the finished cake at room temperature for more than 2 hours; cool leftovers promptly and store them covered in the refrigerator for up to 3 days. Reheat individual portions gently in the microwave until just warm. Always use a slow cooker in good condition, keep the lid on during cooking to maintain a safe temperature, and avoid using damaged or heavily scratched inserts.
