This slow cooker limoncello spritz dump cake is lemony, sweet, and warm, with an almost fizzy citrus flavor from lemon-lime soda. It comes together with just lemon pie filling, lemon cake mix, and soda—no mixer, no bowl to wash, and no stirring required. Dump cakes live in that wonderfully forgiving middle ground where seconds are practically guaranteed.
Why You’ll Love It
- Just three ingredients — lemon pie filling, lemon cake mix, and soda.
- No stirring required — the filling stays soft underneath while the top turns tender and cakey.
- Slow cooker convenience — no need to heat up the kitchen.
- Serves about eight — perfect for easy summer desserts.
Ingredient Notes
Use a regular box of lemon cake mix, around 15.25 ounces. The lemon mix gives the dessert that sunny, punchy flavor, and I wouldn’t swap it unless I had to. White or vanilla cake mix works in a pinch, though the finished dessert is sweeter and less lemon-forward. Still good. Just different. Like a movie remake—you may enjoy it, but you’ll have opinions.
For the pie filling, grab a 21-ounce can of lemon pie filling. Not lemon curd. Lemon curd is lovely, but it is not what we’re after here and tends to be richer and thicker. Pie filling has that familiar glossy, old-fashioned texture that works beautifully under the cake layer.
The soda can be plain lemon-lime soda, whatever brand is on sale, or a sparkling limoncello-style spritz soda if available. Regular Sprite-type soda comes out just fine. The finished dessert is too good for brand reports.
You’ll need a 4- to 6-quart slow cooker. Nothing fancy required.
Ingredients
- 1 box lemon cake mix, about 15.25 ounces, dry straight from the box
- 1 can lemon pie filling, about 21 ounces
- 1 cup lemon-lime soda or sparkling limoncello-style spritz soda—use whichever one is available without making a second store stop
Instructions
- Lightly grease the inside of a 4- to 6-quart slow cooker. No need to get precious about it; a quick coating of cooking spray or a little butter rubbed around the sides is enough. Spread the entire can of lemon pie filling evenly across the bottom. It will look a little startlingly yellow, but that’s part of its charm.
- Sprinkle the dry lemon cake mix evenly over the pie filling, covering the surface as best you can. Do not stir it into the filling. This step can feel counterintuitive, but it matters. A few small uneven spots are perfectly fine—this is dump cake, not a formal presentation.
- Slowly pour the 1 cup of lemon-lime soda over the dry cake mix, trying to moisten as much of the top as possible. Again, do not stir. Pour gently rather than dumping it all in one puddle to avoid a strange bald patch in the middle.
- Cover the slow cooker and cook on high for 2 to 2 1/2 hours, or cook on low for 4 hours. It’s ready when the filling is bubbling around the edges and the top looks set with some golden areas. Slow cookers vary wildly, even when they claim not to, so start peeking near the earlier end of the cooking time. Don’t lift the lid every ten minutes, though. That just lets out heat and gives the dessert less time to cook.
- Turn off the slow cooker and let the dump cake rest for 10 to 15 minutes before serving. This little pause helps the lemon filling thicken up slightly so it doesn’t run all over the bowl. Spoon it warm into bowls and serve it plain, or add vanilla ice cream for an especially happy dessert. Whipped cream is good too. Mascarpone is delicious for a bit of extra flair.
Variations
If you want a richer, more classic dump-cake-style top, drizzle 1/2 cup melted butter over the cake mix before cooking. It is no longer a three-ingredient dessert, obviously, but nothing is coming to revoke your summer-dessert privileges. The butter gives the top a deeper golden color and a fuller flavor.
Scatter a handful of blueberries over the lemon pie filling before adding the cake mix. Raspberries work nicely too, especially for that sweet-tart thing. The berries look pretty, but more importantly, they cut through the sweetness a little. Whipped cream works nicely instead of ice cream.
A lemon cake mix with a pudding addition can come out softer than expected. Not inedible, heavens no, but more pudding-cake than dump cake. If the top seems very soft toward the end, prop the lid open just a bit with the handle of a wooden spoon for the last 20 to 30 minutes. That lets some steam escape. Monitor closely. Wooden spoons have caused enough drama in kitchens without adding more.
Storage & Reheating
Let leftovers cool, then cover and refrigerate them. They’ll keep well for a few days, though the topping does soften after chilling. The flavor becomes even more lemony after a night in the fridge.
Reheat individual portions in the microwave until warm. Start with a short burst, maybe 30 seconds, then add time as needed. A fresh spoonful of whipped cream makes leftover portions feel less like leftovers, which is a useful trick generally.
This one is not ideal for freezing. The filling and soft cake topping get a little weepy after thawing. Weepy is not an appetizing word, yet it is accurate. Better to make it for immediate serving, or enjoy lemon cake from the refrigerator with a spoon while standing at the counter. There are worse evenings.
Final Notes
A warm lemon dessert can be almost ridiculously cheerful. It’s three ingredients. Three.
After elaborate layer cakes, homemade pies, and what feels like every mixing bowl in North America, recipes like this have their place. The measuring and fuss can be lovely when there is time and patience, which is not always the same thing.
This is for hot afternoons, last-minute gatherings, and when dessert should feel a little special without a rolling pin. And frankly, lemon cake should not require sweating over an oven.
Just remember: don’t stir. That’s the whole secret, more or less.
Slow Cooker 3-Ingredient Limoncello Spritz Dump Cake
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Ingredients
- 1 box lemon cake mix about 15.25 ounces; use dry, straight from the box
- 1 can lemon pie filling about 21 ounces
- 1 cup lemon-lime soda or sparkling limoncello-style spritz soda
Instructions
- Lightly grease the inside of a 4- to 6-quart slow cooker with cooking spray or a little butter.
- Spread the entire can of lemon pie filling evenly across the bottom of the slow cooker.
- Sprinkle the dry lemon cake mix evenly over the pie filling, covering the surface as best you can, and do not stir.
- Slowly pour the lemon-lime soda over the dry cake mix, trying to moisten as much of the top as possible without stirring.
- Cover the slow cooker and cook on high for 2 to 2 1/2 hours, or on low for 4 hours.
- The dump cake is ready when the filling is bubbling around the edges and the top looks set with some golden areas.
- Turn off the slow cooker and let the dump cake rest for 10 to 15 minutes before spooning it warm into bowls and serving plain or with vanilla ice cream or whipped cream.
