This 3-ingredient baked sweet is the kind of playful, low-effort dessert people make when they want something festive without pulling out a long ingredient list. Using dry funfetti cake mix as the base gives it that classic birthday-cake flavor and colorful sprinkle look, while the creamy ingredient and butter create an easy dump-style bar that bakes up soft, rich, and lightly crisp around the edges. It is especially fitting for National Junk Food Day, when over-the-top convenience desserts feel entirely appropriate.
Serve these sweet bars slightly warm or fully cooled, cut into small squares since they are quite rich. A scoop of vanilla ice cream, a dollop of whipped cream, or a handful of fresh berries balances the sweetness nicely, and coffee or cold milk makes an easy pairing if you are putting them out for a casual dessert tray.
3-Ingredient Oven Baked Funfetti Cake Mix Sweet Bars
Servings: 12
Ingredients
1 box (15.25 ounces) dry funfetti cake mix
1 can (21 ounces) sweetened condensed milk
1/2 cup (1 stick) unsalted butter, melted
Directions
1. Preheat the oven to 350°F and lightly grease a rimmed sheet pan or quarter sheet pan for easy removal and cleaner edges.
2. Pour the dry funfetti cake mix into the prepared pan and spread it into an even layer. Drizzle the sweetened condensed milk over the top as evenly as possible, then pour the melted butter across the surface.
3. Use a spatula or spoon to gently combine and press the mixture so the dry mix is moistened throughout. It will look thick and rustic rather than smooth.
4. Bake for 22 to 28 minutes, or until the top looks set and the edges are lightly golden. The center should be soft but no longer wet.
5. Let the bars cool in the pan for at least 20 minutes before slicing into squares or rectangles. Serve warm for a gooier texture or cool completely for cleaner slices.
Variations & Tips
Pan size tip: A quarter sheet pan or similar small rimmed pan works best here. If the pan is too large, the mixture will spread too thin and bake up dry instead of soft and bar-like.
Texture adjustment: For a more crumbly, cake-mix-bar texture, stir only lightly before pressing into the pan. For a more uniform, fudgier result, mix the three ingredients more thoroughly before spreading.
Add-ins: If you do not mind going beyond three ingredients, white chocolate chips or extra rainbow sprinkles fold in nicely and emphasize the birthday-cake flavor.
Serving idea: These bars are very sweet, so cut them small and pair them with unsweetened coffee, plain whipped cream, or fresh strawberries to balance the richness.
Storage: Store covered at room temperature for up to 2 days or refrigerate for up to 5 days. A short warm-up in the microwave brings back the soft, gooey center.