This 3-ingredient slow cooker lemon blueberry cake is the kind of dessert you throw together on a busy afternoon and still feel proud serving after dinner. You literally toss fresh blueberries into the slow cooker, sprinkle in a lemon cake mix, drizzle over some melted butter, and let the magic happen while you get on with your day. It’s a cozy, Midwest-style shortcut dessert that tastes like you fussed, but no one needs to know how simple it really was.
Spoon the warm lemon blueberry cake into bowls and top it with a scoop of vanilla ice cream or a dollop of whipped cream so it melts down into all the little pockets of cake and berries. It’s also lovely with a simple dusting of powdered sugar if you want to keep things lighter. For coffee lovers, serve it alongside a hot mug of coffee or tea for an easy dessert-and-coffee moment with friends. If you’re feeding kids, you can cool it slightly and serve smaller portions in ramekins so everyone gets their own little blueberry-filled bowl.
3-Ingredient Slow Cooker Lemon Blueberry Cake
Ingredients
3 cups fresh blueberries, rinsed and patted dry
1 box (about 15.25 ounces) lemon cake mix
1/2 cup (1 stick) unsalted butter, melted
1 box (about 15.25 ounces) lemon cake mix
1/2 cup (1 stick) unsalted butter, melted
Directions
Lightly grease the bottom and sides of a 4- to 6-quart slow cooker with cooking spray or a thin layer of butter so the cake doesn’t stick.
Scatter the fresh blueberries evenly across the bottom of the slow cooker. They should form a single, fairly even layer that covers the base.
Sprinkle the dry lemon cake mix evenly over the blueberries. Do not stir. Gently shake the slow cooker insert or tap it on the counter to help the cake mix settle down over the berries.
Slowly drizzle the melted butter over the dry cake mix, trying to cover as much of the surface as you can. It’s okay if a few small dry spots remain; they will hydrate as the cake cooks.
Cover the slow cooker with the lid. Cook on HIGH for 2 to 2 1/2 hours, or on LOW for 3 1/2 to 4 hours, until the top looks set and the edges are lightly golden. The cake will be more like a soft, scoopable cobbler than a firm, sliceable cake.
Once done, turn off the slow cooker and let the cake sit, covered, for about 10 to 15 minutes to set up slightly. Spoon the warm lemon blueberry cake into bowls and serve with your favorite toppings.
Variations & Tips
For a slightly less sweet dessert, use an extra handful of blueberries and gently toss them with 1 to 2 teaspoons of lemon juice before adding them to the slow cooker for a brighter, more tart bite. If you have picky eaters who aren’t wild about lots of fruit, you can cut the blueberries down to 2 cups and sprinkle a few extra on just one side of the slow cooker so the other side is more cake-heavy. To make it feel a bit fancier for company, zest a fresh lemon over the top right after cooking, or stir a teaspoon of vanilla extract into the melted butter before drizzling it on. If you need to keep it dairy-free, swap the butter for an equal amount of melted dairy-free margarine or coconut oil (just know coconut oil will add a light coconut flavor). For a fun kid-friendly twist, let the kids sprinkle white chocolate chips or a handful of sliced almonds over the cake mix before the butter goes on; they’ll melt and toast slightly as it cooks, adding texture and a little extra excitement without complicating the recipe too much.