This slow cooker 3-ingredient black forest cake is the kind of dessert that turns heads at a summer barbecue and has everyone asking, “How did you make that?” It leans on pantry staples—boxed cake mix, cherry pie filling, and butter—to create a rich, fudgy chocolate cake swirled with glossy ruby red cherries. Black Forest cake traditionally comes from Germany’s Black Forest region and is known for its layers of chocolate, cherries, and cream; here, we capture the chocolate-and-cherry essence in a much simpler, hands-off format that cooks right in your slow cooker. It’s practical, nearly foolproof, and perfect when you want a decadent dessert without heating up the whole kitchen.
Serve this cake warm, scooped straight from the slow cooker into small bowls so you capture all the gooey chocolate and cherries in each serving. A dollop of lightly sweetened whipped cream or a small scoop of vanilla ice cream gives a nod to the classic Black Forest pairing and balances the richness. Strong coffee, espresso, or a glass of cold milk works well alongside, and if you enjoy wine, a small pour of ruby port or a fruit-forward red makes a nice match. For a party, keep the slow cooker on “warm” and set out bowls, spoons, and a can of whipped cream so guests can help themselves.
Slow Cooker 3-Ingredient Black Forest CakeServings: 8-10
Ingredients
1 (15.25-ounce) box chocolate cake mix (any standard brand, dry mix only)
2 (21-ounce) cans cherry pie filling
1/2 cup (1 stick, 8 tablespoons) unsalted butter, melted
Directions
Prepare the slow cooker: Lightly coat the inside of a 5- to 6-quart slow cooker with nonstick cooking spray or a very thin layer of butter to help prevent sticking and make cleanup easier.
Layer the cherries: Pour both cans of cherry pie filling into the bottom of the prepared slow cooker. Use a spatula or the back of a spoon to spread the cherries into an even layer that fully covers the base.
Add the dry cake mix: Sprinkle the dry chocolate cake mix evenly over the cherry pie filling. Aim for a fairly uniform layer so the cake cooks evenly; do not stir. Leaving it mostly undisturbed helps create that fudgy, spoonable texture with pockets of cherries.
Drizzle on the butter: Slowly drizzle the melted butter over the top of the dry cake mix, trying to moisten as much of the surface as possible. It’s fine if a few dry spots remain; the steam from the slow cooker and the moisture from the cherries will help hydrate the mix as it cooks.
Cook the cake: 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. The cake is done when most of the top looks set and a bit matte, but the texture underneath is still soft and spoonable, almost like a cross between cake and warm pudding. Avoid lifting the lid in the first 90 minutes, as this releases heat and can extend the cooking time.
Rest briefly: Once the cake is done, turn the slow cooker to the WARM setting or turn it off completely. Let the cake sit, covered, for about 10 to 15 minutes. This rest helps the dessert thicken slightly while still staying wonderfully moist and fudgy.
Serve: Scoop the warm black forest cake straight from the slow cooker into small bowls, making sure each serving has plenty of both cake and cherries. Serve as is for the pure three-ingredient version, or add a spoonful of whipped cream or a small scoop of vanilla ice cream on top if you like.
Variations & Tips
For a slightly deeper chocolate flavor, choose a dark chocolate or devil’s food cake mix instead of standard chocolate. If you’d like a subtle almond note (a classic Black Forest accent) but want to stay close to the three-ingredient spirit, you can use an almond-flavored cherry pie filling when available. For an extra-rich texture, you can swap half of the melted butter for heavy cream, though this technically adds another ingredient; it creates an even more pudding-like layer under the cake. If your slow cooker runs hot, start checking for doneness about 15 minutes earlier than the suggested time to prevent burning around the edges. To make cleanup easier, you can line the slow cooker with a parchment or slow-cooker-safe liner before adding the ingredients. Food safety tips: Always cook the dessert on HIGH or LOW settings as directed; do not use the WARM setting to cook from the start, as it may not bring the mixture to a safe temperature quickly enough. Once cooked, do not leave the cake on the WARM setting for more than 2 hours; after that, transfer leftovers to a shallow container, cool, and refrigerate. Leftovers should be refrigerated within 2 hours of cooking and can be stored in the fridge for up to 3 days. Reheat portions gently in the microwave until just warm, and discard if you notice any off odors or visible spoilage.
