
This peach cake is pure comfort and nostalgia for me because it brings together real peaches and a boost of peach Jello in one irresistible slice. The brown sugar frosting melts right into the cake, making it the perfect treat for birthdays or anytime you need a little pick-me-up.
This cake is an old favorite in our house. The first time I made it with my daughter she could not stop swiping tastes of that thick brown sugar frosting right from the bowl.
Ingredients
- Yellow cake mix: I use a good quality boxed mix because it guarantees a tender cake base with minimal effort
- Peach Jello powder: This intensifies the peachy taste and gives the cake a beautiful color look for Jello with natural flavors if you prefer
- Eggs: Fresh eggs add richness and help the cake rise properly always crack them into a separate bowl to avoid shell pieces
- Vegetable oil: It creates a moist crumb choose a neutral oil like canola or grapeseed for best results
- Frozen peach slices: These give the cake real fruit flavor and texture grab a bag with no added sugar or syrup
- Salted butter: For the frosting salt brings out the flavor of the brown sugar and balances the sweetness
- Brown sugar: Packed for accuracy this ingredient is the star of the frosting use dark brown for a deeper molasses taste if you love that
- Heavy cream: Makes the frosting luxuriously rich and smooth creamy over low heat is key to avoid scorching
- Vanilla extract: Adds a warm flavor to the frosting pure vanilla really makes a difference here
Step-by-Step Instructions
- Make the Batter:
- Combine the dry cake mix with the peach Jello powder in a large bowl. Add eggs and oil then mix on medium speed for about 2 minutes until the batter is thick and glossy. This ensures everything is well incorporated.
- Prep the Peaches:
- Cut each frozen peach slice into halves or quarters. This makes sure every piece in the cake is easy to eat and well distributed. You want small pieces so they do not sink to the bottom.
- Fold in the Peaches:
- Use a sturdy spoon or spatula to gently stir the peach pieces into the batter. Fold just until they are evenly dispersed so the cake bakes up with fruit in every bite.
- Bake the Cake:
- Pour the batter into a greased 9 by 13 inch pan. Bake at 350 degrees for 40 to 45 minutes. The edges should look quite brown and a toothpick should come out clean or with a few moist crumbs. Let the cake cool completely on a wire rack.
- Make the Brown Sugar Frosting:
- In a saucepan combine the salted butter brown sugar and heavy cream. Heat over medium high stirring often until it comes to a full bubbling boil across the top. Let it boil exactly one minute so the sugar dissolves fully.
- Cool and Beat the Frosting:
- Remove the pan from heat stir in vanilla then set the pot into an ice bath. Make sure no water drips into your frosting. As it cools scrape the sides and stir now and then until it thickens to room temperature. Then beat with a mixer for 3 to 5 minutes until the frosting is thick but still spreadable.
- Frost the Cake:
- Spread the frosting over the cooled cake in an even layer. Let it set for at least fifteen minutes before slicing for beautiful even squares.

My favorite part is using frozen peaches because they hold their shape and give sweet juicy bites every time This cake always reminds me of late summer afternoons baking with my sister watching the frosting thicken and sneaking peach slices when we thought nobody was looking
Storage Tips
Once fully cooled the cake can be left at room temperature for a day or two covered tightly. After that pop it in the fridge to keep it fresh for up to five days. If you want to freeze it wrap individual squares tightly and store them for up to two months. Let thaw at room temp or microwave for a few seconds for a warm treat.
Ingredient Substitutions
If fresh peaches are in season swap frozen for ripe peeled chunks and blot well with paper towels before using. Canned peaches also work but drain thoroughly and reduce extra syrup. For the frosting you can use half and half instead of heavy cream though the texture will be a tiny bit lighter.
Serving Suggestions
I love serving this cake cold straight from the fridge especially in summer. For a showstopper at a party top each square with a dollop of whipped cream and a small peach wedge. A scoop of vanilla ice cream on the side turns it into a decadent peach sundae.

Cultural and Historical Context
Cakes with fruit and quick frostings have a long tradition in American baking especially for summer gatherings and family reunions. Using Jello in cakes became popular in the mid 20th century and this recipe is a great example of that playful flavor boost now considered a nostalgic comfort food.
Recipe FAQs
- → Can I use fresh peaches instead of frozen?
Yes, fresh peaches work well as long as they're cut into bite-sized pieces and drained if overly juicy.
- → How do I know when the cake is done baking?
The cake is done when a toothpick inserted in the center comes out clean or with a few moist crumbs.
- → What if I want a lighter frosting?
Try using cream cheese or whipped cream for a lighter, less rich frosting alternative.
- → Can this cake be served warm?
Yes, individual slices can be microwaved for 10-15 seconds to gently warm them up for serving.
- → How should I store leftover cake?
The cake will stay fresh at room temperature for a day or two, but refrigerate for longer storage.
- → Can I increase peach flavor?
A few drops of peach extract can be added to the batter if a more intense peach flavor is desired.