Cake Mix Peach Cobbler Bars are my go-to when I want a simple peach dessert that still tastes like you made a real effort. You get a buttery crust, a cinnamon-peach filling, and a golden crumble on top.
I love how these slice cleanly once they’re chilled, so they’re easy to serve on a platter. The cake mix base bakes up a little crisp on the edges and tender in the middle, and the peaches stay sweet and jammy.
For me, these are best for potlucks, cookouts, and weekend baking when you want something familiar and warm-spiced. They’re also nice with coffee in the afternoon, or as a low-fuss dessert after dinner.
Why You’ll Love This Recipe
Fast and Easy: It’s the kind of bar dessert you can pull together quickly with pantry basics, and it bakes in one pan.
Real Cobbler Flavor: The cinnamon, brown sugar, and lemon make the peach layer taste like classic cobbler filling, not just fruit on a crust.
Great Slice-and-Serve: Once chilled, these cut into neat bars that travel well and don’t need any fancy plating.
Buttery Crumble Top: The topping bakes up deeply golden and gives you that crunchy contrast against the soft peaches.
Easy to Tweak: You can switch up the cake mix, add nuts, or use fresh peaches when they’re in season.
Ingredients You’ll Need
Pan and crust
- Yellow cake mix: I use a standard box mix here, and it does a lot of the work for you. Butter cake mix also tastes great if you find it.
- Egg: Helps bind the crust so it presses in nicely and holds together once baked.
- Unsalted butter: Melted butter is what makes the crust taste rich and a little “cookie bar” like. If you only have salted butter, just go lighter on the added salt.
- Kosher salt: Don’t skip it. It keeps the crust from tasting flat and makes the peach layer taste more peachy.
- Nonstick cooking spray: Even with parchment, I still spray the pan so the corners don’t stick.
Peach filling
- Canned sliced peaches in juice: This is the easiest option and it’s reliable year-round. I drain them really well so the bars don’t get soggy, then chop them so the filling layers evenly.
- Light brown sugar: Adds a deeper sweetness that goes well with cinnamon. Dark brown sugar works too if that’s what you have.
- Cornstarch: Thickens the peach juices as it bakes so you get a more set, sliceable bar.
- Ground cinnamon: Keeps the flavor in that peach cobbler lane. If you like more spice, you can add a tiny pinch of nutmeg.
- Lemon juice: A little acidity helps the filling taste brighter and less one-note.
- Vanilla extract: Rounds everything out and makes the peaches taste more dessert-like.
Crumble topping
- Unsalted butter: This is what turns the reserved crumbs into a real crumble topping instead of dry bits.
- Reserved cake mix crumbs: I like using the same crust mixture for the topping since it bakes up crisp and buttery.
- Rolled oats (optional): Totally optional, but I like the extra texture. Use old-fashioned rolled oats, not instant.
Recipe Instructions
- Preheat the oven: Heat the oven to 350°F. Grease a 9×13-inch pan with nonstick spray and line it with parchment paper, leaving an overhang on the long sides for lifting out later.
- Mix the crust: In a large bowl, mix the cake mix, egg, melted butter, and salt until the mixture looks crumbly and evenly combined.
- Reserve crumbs: Scoop out 1/3 cup of the crust mixture and set it aside for the topping.
- Press into the pan: Press the remaining crust mixture firmly into the bottom of the prepared pan in an even layer.
- Mix the filling: In a bowl, toss the drained, chopped peaches with the brown sugar, cornstarch, cinnamon, lemon juice, and vanilla until coated.
- Add the filling: Spread the peach mixture evenly over the crust.
- Make the crumble: Stir the reserved cake mix crumbs with the melted butter, and add the oats if you’re using them. Sprinkle the crumble evenly over the peaches.
- Bake: Bake for 35 to 45 minutes, until the topping is deep golden and the filling is bubbling around the edges.
- Cool and chill: Cool completely at room temperature, then chill for 1 hour for cleaner slices.
- Slice: Lift the bars out using the parchment overhang, then cut into bars.
Some of my tips!
This is the part that really makes a difference. If you only read one section, make it this one because this is where I share the little trick that helps the recipe turn out so well.
Recipe Tips & Tricks
Drain the peaches really well. This matters more than anything else. If the peaches are still dripping, you’ll end up with a softer crust and a looser filling.
Press the crust in firmly. Take a minute to really pack it down, especially along the edges. A loose crust layer can mix into the peaches and make the bars harder to slice cleanly.
Chop the peaches. Big slices tend to stack and leave gaps, and the filling layer won’t feel as even. Roughly chopped peaches spread out better and give you more consistent bars.
Watch the color, not just the timer. I let these go until the top is a deeper golden brown, not pale. The bubbling around the edges is a good sign the cornstarch is doing its job.
Chill before cutting. If you cut too soon, the filling can slide around. An hour in the fridge makes a big difference for neat slices.
Make some touches!
There are plenty of easy ways to serve this depending on the occasion. Keep it simple, or add a few small touches to make it feel a little more special.
Serving Suggestions
- Ice cream: Serve a bar with a scoop of vanilla ice cream on the side. I like this best when the bar is slightly cool and the ice cream is melting a bit.
- Whipped cream: A simple dollop on top is plenty. If you want something extra, a pinch of cinnamon on the whipped cream is nice.
- Caramel sauce: A light drizzle works well if you want it sweeter. I’d keep it minimal so it doesn’t cover up the peach flavor.
- Fresh fruit: Add a few fresh berries on the plate if you want a little contrast. Blueberries and raspberries are both good with peaches.
Save it for later
This section covers how to store leftovers and what parts of the recipe you can prepare ahead of time.
Storage and Make Ahead
Store leftovers covered in the fridge for up to 5 days. I keep them right in the pan, or move sliced bars to a container with a tight lid.
If you want cleaner slices for serving, chill the bars first and keep them cold until you’re ready to cut and plate them. They hold together better that way.
For longer storage, you can freeze the bars for up to 2 months. I like freezing individual pieces so you can grab one or two at a time.
Thaw in the fridge overnight before serving, or let a bar sit out for a bit until it softens. They’re also good slightly chilled.
A few quick answers
This section covers a few extra details that may help before you head to the recipe card.
Recipe FAQs
Can I use fresh peaches instead of canned?
Yes. Use about 4 cups of peeled, sliced fresh peaches. Depending on how sweet they are, you may want an extra 2 tablespoons of sugar.
Why are my bars soggy?
The most common reason is peaches that weren’t drained well enough. Also make sure you bake until the top is deeply golden and you see bubbling at the edges, which helps the filling set.
Can I swap the yellow cake mix?
Definitely. Butter cake mix works great, and spice cake mix is really good if you want more warm spice flavor. I’d keep the filling the same the first time, then adjust cinnamon later if you want.
Do I have to add the oats in the topping?
No, you can leave them out. The topping still bakes up crisp from the reserved cake mix crumbs and butter.
How do I know when they’re done?
Look for a deep golden topping and visible bubbling around the edges of the pan. If the top is still pale, give it a few more minutes.
You might also like
Before you go, take a look at a few other recipes below the recipe card. They use similar ingredients in a different way and are worth saving too.
MORE DINNER RECIPES TO TRY
Cake Mix Peach Cobbler Bars
INGREDIENTS
Pan and crust
- 1 box yellow cake mix 15.25 oz
- 1 large egg
- 1/2 cup unsalted butter melted
- 1/4 tsp kosher salt
- nonstick cooking spray.
Peach filling
- 2 cans sliced peaches in juice 15 oz each drained and chopped
- 1/3 cup light brown sugar packed
- 1 tbsp cornstarch
- 1 tsp ground cinnamon
- 1 tbsp lemon juice
- 1 tsp vanilla extract.
Crumble topping
- 4 tbsp unsalted butter melted
- 1/3 cup cake mix reserved from crust mixture
- 2 tbsp rolled oats optional.
INSTRUCTIONS
Prep
- Heat oven to 350 F
- grease and line a 9x13 inch pan with parchment leaving overhang
- in a bowl mix cake mix egg melted butter and salt until crumbly then reserve 1/3 cup of the mixture for topping
- press remaining mixture firmly into the pan in an even layer.
Fill and bake
- Toss drained peaches with brown sugar cornstarch cinnamon lemon juice and vanilla then spread evenly over crust
- combine reserved cake mix crumbs with 4 tbsp melted butter and oats if using then sprinkle over peaches
- bake until topping is deep golden and filling bubbles around the edges 35 to 45 minutes
- cool completely then chill 1 hour for clean slices and cut into bars.
