This 3-ingredient slow cooker May Day bake is my go-to when I want a cozy, sweet ending to dinner taken care of hours ahead. It reminds me of the simple dump cakes church ladies used to bring to our small-town potlucks, but this one practically makes itself while you go about your day.
A bag of frozen berries, a box of cake mix, and a little butter melt down into a bubbling, deep indigo fruit layer under a pale golden, porous crust. It’s the kind of dessert you can throw together between helping with homework and folding laundry, then forget about until it’s time to scoop it up warm after supper.
Serve this slow cooker May Day bake warm, right out of the crock, spooned into bowls. It’s lovely on its own, but a scoop of vanilla ice cream or a dollop of whipped cream really soaks into the golden crust and mingles with the indigo berry juices.
For something a little lighter, serve with plain or vanilla yogurt and a few fresh berries on top. Coffee, hot tea, or a small glass of cold milk all pair nicely, especially if you’re enjoying it as a relaxed Sunday dessert with family gathered around the table.
3-Ingredient May Day Slow Cooker Berry Bake
Servings: 6-8

For picky eaters, you can use all blueberries instead of mixed berries for a milder flavor and smoother texture, while still getting that deep indigo color. If your family prefers a little tartness, choose a berry blend with more blackberries and raspberries; for sweeter results, stir 1/4 cup of granulated sugar into the frozen berries before adding the cake mix (this doesn’t change the 3-ingredient base, just an optional tweak).
A white, lemon, or butter cake mix can replace the yellow cake mix if that’s what you have on hand. To add a little crunch without complicating things, sprinkle 1/4 cup chopped nuts (like pecans or almonds) over the cake mix before drizzling on the butter. For a slightly lighter version, you can cut the butter down to 6 tablespoons; the crust will be a bit less rich but still tasty.
If you need this dessert to be dairy-free, use a dairy-free margarine or plant-based butter stick instead of regular butter, and be sure your cake mix is dairy-free. For gluten-free needs, choose a gluten-free yellow or vanilla cake mix and confirm your frozen berries are plain (no added sauces or thickeners).
Food safety tips: Always keep the berries frozen until they go into the slow cooker; do not let them sit out at room temperature for long periods. Make sure your slow cooker reaches and maintains a safe temperature by keeping the lid on while cooking and avoiding repeated lifting to peek. Once cooked, do not leave the dessert on the warm setting for more than 2 hours; refrigerate leftovers in a shallow container once cooled, and reheat portions gently in the microwave until steaming hot before serving again.