This 3-ingredient slow cooker oat dessert is the kind of easy, low-effort treat that feels made for a busy holiday weekend. Using raw rolled oats, pie filling, and a boxed cake mix, it turns into a warm, scoopable dessert with cozy crumble-like texture and festive red-and-blue appeal when you choose berry flavors for the Fourth of July. It is a practical pantry recipe that comes together fast, which is exactly why it earns a spot when oven space is limited and you still want something sweet on the table.
Serve this warm with vanilla ice cream, whipped cream, or a spoonful of Greek yogurt if you like a less-sweet finish. For a holiday spread, it pairs nicely with grilled burgers, hot dogs, barbecue chicken, fruit salad, and iced tea or lemonade. If you want the colors to lean patriotic, use cherry or strawberry pie filling and top each serving with fresh blueberries right before serving.
3-Ingredient Slow Cooker Fourth of July Oat Dessert
Servings: 8
Ingredients
2 cups raw rolled oats
1 can (21 ounces) cherry or strawberry pie filling
1 box (about 15.25 ounces) vanilla or yellow cake mix
Directions
1. Lightly coat the inside of the slow cooker with nonstick spray or a thin layer of butter if desired for easier cleanup.
2. Spread the raw rolled oats evenly across the bottom of the slow cooker.
3. Spoon the pie filling over the oats and gently spread it out so the oats are mostly covered.
4. Sprinkle the dry cake mix evenly over the top to create the final layer. Cover and cook on low for 2 1/2 to 3 1/2 hours, until the fruit is bubbly and the top looks set and lightly golden around the edges.
5. Turn off the slow cooker and let the dessert rest for 10 to 15 minutes before scooping into bowls and serving warm.
Variations & Tips
Blueberry version: Use blueberry pie filling instead of cherry or strawberry for a darker, jammy flavor. Add a few fresh strawberries on top when serving to keep the red, white, and blue theme.
Crunchier topping tip: If you like a little more texture, prop the lid slightly open during the last 20 to 30 minutes of cooking so excess moisture can escape. This helps the top dry out a bit more instead of staying very soft.
Make-ahead tip: This dessert reheats well, so you can make it earlier in the day and warm individual portions in the microwave. I like doing this when the kitchen is already busy with cookout food and I do not want one more thing competing for attention.
Serving upgrade: A scoop of vanilla ice cream or whipped topping really balances the warm fruit and sweet cake layer. If you have fresh blueberries on hand, scatter a few over each serving right before bringing it to the table.