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

You can start with a standard box of yellow or spice cake mix to save time on a busy afternoon. Prepare the cake mix according to the box directions, then swirl the cinnamon-sugar mixture directly into the batter before baking. Top the baked cake with your homemade peach filling and crispy oatmeal crumble as directed.

Can I use fresh peaches instead of canned?

Fresh, ripe peaches are wonderful when they're in season because they offer a bright, natural flavor. However, canned peaches are a fantastic year-round alternative that saves you the trouble of peeling and slicing. If using canned peaches, drain them thoroughly before chopping to prevent excess moisture from making your cake soggy.

What is the best way to serve it?

This casual cake is best served slightly cool or at room temperature so the buttercream border holds its shape. Slice it into generous squares and serve it directly from the baking pan for a rustic touch. A scoop of vanilla bean ice cream on the side is always a welcome addition for dessert.

How long does it stay fresh?

This dessert stays incredibly soft and delicious for up to five days when stored in an airtight container in your refrigerator. Because of the fresh fruit filling and dairy-based buttercream, it shouldn't be left on the counter. Slice off a piece whenever a weekday craving strikes and let it sit at room temperature for ten minutes before eating.

How do I keep the cake from getting soggy?

Cooking the peach filling until it's thick and glossy helps prevent excess juice from soaking into the crumb. Be sure to let the cake, filling, and crumble cool completely before assembling your dessert. This barrier of fluffy vanilla buttercream also prevents the fruit juices from seeping directly into the cake base.

Can I freeze this sheet cake?

You can easily freeze the baked cake base without any of the toppings for up to three months. Wrap the cooled cake tightly in plastic wrap and aluminum foil before storing it in your freezer. When you're ready to serve, thaw the cake at room temperature, then make the fresh buttercream and peach toppings.

Do I have to use buttermilk?

Buttermilk is highly recommended because its acidity reacts with the baking soda to create a light, tender crumb. If you don't have any on hand, you can make a quick substitute in under five minutes. Stir one tablespoon of lemon juice or white vinegar into one cup of whole milk and let it sit until slightly curdled.

Easy Peach Cobbler Sheet Cake: Best Summer Dessert Recipe

Description

This rustic sheet cake combines the spiced, buttery essence of a classic peach cobbler with the convenience of a single-pan bake. Featuring a tender buttermilk base, jammy fruit filling, and a crunchy oatmeal topping, it is an effortless dessert perfect for busy weeknights.

Ingredients

2 1/2 cups all-purpose flour
2 tsp baking powder
1/2 tsp baking soda
1/2 tsp fine salt
1/2 cup unsalted butter, softened
1 1/2 cups granulated sugar
3 egg whites
1/2 cup sour cream
1 tbsp pure vanilla extract
3/4 cup buttermilk
1/2 cup brown sugar
1 tsp ground cinnamon
2 tbsp melted butter
3 cups chopped fresh peaches
1 tbsp lemon juice
2 tbsp brown sugar
1/4 tsp ground cinnamon
1/4 tsp nutmeg
1 tbsp cornstarch
1 cup old fashioned oats
1/2 cup flour
1/4 cup brown sugar
1/4 cup granulated sugar
1/2 tsp cinnamon
1/4 cup melted butter
1 cup softened butter
3 cups powdered sugar
1 tsp vanilla bean paste
2 tbsp heavy cream

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Instructions

Prep the oven. Preheat your oven to 350°F (177°C) and grease a 9×13-inch sheet pan.
Whisk dry ingredients. Combine the flour, baking powder, baking soda, and salt in a large bowl.
Cream butter mixture. Beat softened butter and granulated sugar until fluffy, then incorporate egg whites, sour cream, and vanilla.
Combine the batter. Alternately add the dry flour mixture and buttermilk to the wet ingredients, mixing only until just combined.
Create cinnamon ribbons. Mix brown sugar, flour, cinnamon, and melted butter; drop spoonfuls over the batter and swirl with a knife.
Bake the cake. Bake for 30 to 35 minutes until golden and a toothpick comes out clean.
Simmer fruit filling. Cook peaches, lemon juice, sugar, spices, and cornstarch slurry in a saucepan until thickened; chill until cold.
Toast the crumble. Spread the oat mixture on a parchment-lined pan and bake at 350°F for 10 minutes until golden.
Prepare the frosting. Whip softened butter, powdered sugar, vanilla bean paste, salt, and heavy cream until fluffy.
Assemble the cake. Spread buttercream over cooled cake, layer with chilled peach filling, and top with the crispy oatmeal crumble.

Notes

Ensure all dairy and egg components are at room temperature to achieve a stable, emulsified batter.
Use a kitchen scale to measure flour accurately by weight to avoid a dense or dry crumb.
Chill the frosted cake base briefly before adding the fruit layer to maintain crisp, distinct components.
Bake the oatmeal topping on a separate tray to ensure the oats achieve a crunchy, toasted texture rather than steaming on top of the cake.

Prep Time: 25 mins
Cook Time: 45 mins
Category: Dessert
Method: Baking
Cuisine: American