How do you make a peach cobbler sheet cake using boxed cake mix?

To use a box mix, prepare a yellow or white cake batter according to the package directions, adding a teaspoon of cinnamon for flavor. Spread the batter in your pan, swirl in the homemade cinnamon mixture, and bake as directed. Once cooled, top with the scratch-made peach filling and toasted oat crumble to retain that authentic homemade taste.

Can I use fresh peaches instead of canned?

Yes, fresh peaches are highly recommended for this recipe because they offer a firmer texture and a brighter flavor. Canned peaches can also be used if fresh fruit is out of season, but be sure to drain them thoroughly and reduce the added sugar in the filling. Fresh peaches provide that beautiful, authentic summer taste that truly makes the cake shine.

What is the best way to serve it?

This dessert is best served at room temperature or slightly warmed, allowing the buttery cinnamon flavors to open up beautifully. A generous scoop of vanilla bean ice cream or a dollop of fresh whipped cream on the side completes the experience. It makes a stunning centerpiece on any dessert table, especially when served on a cherished heirloom cake stand.

How long does it stay fresh?

When kept in an airtight container in the refrigerator, this dessert will stay fresh and delicious for up to five days. To enjoy it at its best, let individual slices sit on the counter for about fifteen minutes before serving to soften the buttercream. The oat crumble may lose some of its crunch over time, but the cake remains wonderfully moist.

How do I keep the cake from getting soggy?

The key to preventing sogginess is to let both the cake and the cooked peach filling cool completely before assembly. Spreading warm peaches onto the frosting will cause the buttercream to melt and create unwanted moisture. Additionally, cooling the oatmeal crumble completely makes sure it stays crisp and acts as a barrier against the fruit.

Can I freeze this cake after assembly?

While you can freeze the assembled cake, the oatmeal crumble may lose its signature crispy texture once thawed. For the best results, we recommend freezing the baked cinnamon cake and the cooked peach filling in separate airtight containers for up to three months. When you are ready to serve, thaw them overnight in the refrigerator and prepare the fresh crumble right before assembly.

Can I make the oat crumble and peach filling ahead of time?

Preparing these components in advance is an excellent way to save time on the day of your gathering. The peach filling can be stored in the refrigerator for up to four days, while the cooled oat crumble will keep in an airtight container at room temperature for up to two weeks. This makes final assembly quick and stress-free when hosting guests.

Peach Cobbler Sheet Cake Recipe: An Easy Southern Sweet.

Name: Peach Cobbler Sheet Cake
Prep time: 45 min
Cook time: 45 min
Total time: 1 h 30 min
Cuisine: Southern
Ingredients: 2 1/2 cups all-purpose flour; 1 1/2 cups granulated sugar; 1/2 cup unsalted butter, softened; 1 cup buttermilk, room temperature; 1/2 cup sour cream, room temperature; 4 large egg whites; 2 teaspoons baking powder; 1/2 teaspoon baking soda; 1/2 teaspoon fine salt; 1 tablespoon vanilla extract; 1 cup fresh peaches, finely chopped; 1/2 cup light brown sugar; 1 teaspoon ground cinnamon; 1/2 cup old-fashioned oats; 1/2 cup powdered sugar; 1 tablespoon vanilla bean paste; 2 tablespoons heavy cream

Description

This delightful Peach Cobbler Sheet Cake combines a tender cinnamon-spiced crumb with juicy fresh peaches and a crunchy oat streusel. Topped with a silky vanilla bean buttercream, it brings the cozy, nostalgic flavors of a classic Southern dessert into an easy-to-serve sheet pan format.

Ingredients

2 1/2 cups all-purpose flour
1 1/2 cups granulated sugar
1/2 cup unsalted butter, softened
1 cup buttermilk, room temperature
1/2 cup sour cream, room temperature
4 large egg whites
2 teaspoons baking powder
1/2 teaspoon baking soda
1/2 teaspoon fine salt
1 tablespoon vanilla extract
1 cup fresh peaches, finely chopped
1/2 cup light brown sugar
1 teaspoon ground cinnamon
1/2 cup old-fashioned oats
1/2 cup powdered sugar
1 tablespoon vanilla bean paste
2 tablespoons heavy cream

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Instructions

Preheat and grease. Set your oven to 350°F and grease a 9×13 inch baking pan thoroughly.
Whisk dry ingredients. Combine flour, baking soda, baking powder, and salt in a bowl and whisk well.
Cream butter and sugar. Beat the butter and granulated sugar in a stand mixer until light, pale, and fluffy.
Incorporate wet ingredients. Add egg whites, sour cream, and vanilla, beating on high until smooth and creamy.
Combine batter. Alternately fold in the dry mixture and buttermilk, mixing gently to maintain the batter structure.
Swirl cinnamon ribbon. Create a spice paste and swirl it into the cake batter using a knife to marble.
Bake the cake. Bake for 30 to 35 minutes until a toothpick inserted into the center comes out clean.
Simmer peach filling. Cook chopped peaches, brown sugar, and spices until soft, then thicken with a cornstarch slurry and chill.
Toast the crumble. Toss oats, flour, sugar, and butter, then bake on a sheet pan until golden and crispy.
Whip the buttercream. Beat butter, vanilla bean paste, cream, salt, and powdered sugar until thick and spreadable.
Assemble the cake. Spread buttercream over the cooled cake, layer with chilled peach filling, and top with toasted oat crumble.

Notes

Ensure all dairy and egg ingredients are at room temperature to achieve the smoothest batter consistency.
Line your baking pan with parchment paper with an overhang to easily lift the finished cake for clean slicing.
Avoid overmixing the batter after adding flour to keep the cake crumb tender rather than dense.
Chop the peaches into small, uniform pieces so the weight of the fruit does not sink through the frosting.
Let the toasted oat crumble cool completely before adding it to the cake to prevent melting the buttercream.

Prep Time: 45 mins
Cook Time: 45 mins
Category: Dessert
Method: Baking
Cuisine: Southern