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–+ servings
Benjamin

Sweet and Cozy Jam Cake

Looking for a dessert that’s as beautiful as it is delicious? This Easy Jam Cake combines the simplicity of a boxed spice cake mix with the rich flavors of blackberry jam and a creamy dulce de leche frosting. Perfect for casual get-togethers or special occasions, this cake is moist, flavorful, and absolutely irresistible.
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Prep Time 15 minutes
Cook Time 25 minutes
Total Time 1 hour 15 minutes
Servings: 12 servings
Course: Dessert
Cuisine: American
Ingredients Method Notes

Ingredients
  

For the Cake:
  • Cooking spray
  • 1 15.25-ounce box spice cake mix
  • 3 large eggs
  • 1 cup water
  • 1/2 cup canola or vegetable oil
  • 1 cup blackberry jam
For the Frosting:
  • 1/2 cup 1 stick unsalted butter, softened
  • 1 13.4-ounce can dulce de leche
  • 1/2 teaspoon salt
  • 1 1/2 cups 170g powdered sugar

Method
 

Preheat the Oven:
  1. Preheat your oven to 350°F (175°C).
  2. Spray a 9x13-inch baking pan with cooking spray to prevent sticking.
Prepare the Cake Batter:
  1. In a large mixing bowl, combine the spice cake mix, eggs, water, and oil.
  2. Beat the mixture on medium speed for 2 minutes, until the batter is smooth.
Add the Jam:
  1. Pour the batter into the prepared baking pan and spread it evenly.
  2. Use a tablespoon to add dollops of blackberry jam across the top of the batter, spacing them evenly.
  3. Gently swirl the jam into the batter with a butter knife, being careful not to over-mix or let the jam sink.
Bake the Cake:
  1. Bake the cake according to the box instructions, usually 23–28 minutes.
  2. Check doneness by inserting a toothpick into the center (avoiding the jam); it should come out clean.
Cool the Cake:
  1. Remove the cake from the oven and transfer it to a cooling rack.
  2. Let it cool completely for at least 1 hour before frosting.
Make the Frosting:
  1. In a medium bowl, beat the softened butter on medium speed until creamy, about 2 minutes.
  2. Add the dulce de leche and salt, and mix until fully incorporated.
  3. Gradually add the powdered sugar, mixing on low speed until combined. Increase to medium speed and beat until light and fluffy, about 2 minutes.
Frost the Cake:
  1. Spread the frosting evenly over the cooled cake using an offset spatula.
  2. For added flair, drizzle with extra blackberry jam or garnish with fresh berries.
Serve and Enjoy:
  1. Slice the cake into squares and serve immediately. Store leftovers at room temperature for up to 1 day, or refrigerate for up to 5 days.

Notes

  • Jam Variations: Try raspberry, apricot, or strawberry jam for a new flavor twist.
  • Storage Tips: Keep the cake in an airtight container in the fridge to maintain freshness. Bring it to room temperature before serving.
  • Freezing: Wrap individual slices tightly in plastic wrap and freeze for up to 3 months.
  • Customization: Add chopped nuts, coconut flakes, or a drizzle of white chocolate for extra flair.

Tried this recipe?

Let us know how it was!