Tres Leches Cake with Cake Mix

This ultra-moist tres leches cake transforms a simple box mix into a decadent Latin American favorite that’ll have everyone begging for seconds.

Tres Leches Cake with Cake Mix

What makes this cake truly magical is how the three-milk mixture slowly soaks into every crumb, creating an incredibly rich and creamy texture that practically melts in your mouth. The cloud-like whipped topping adds the perfect finishing touch to this heavenly dessert.

Tres Leches Cake with Cake Mix

Ingredients

Tres Leches Cake with Cake Mix

For the Cake:

  • 1 (15-ounce) box French vanilla cake or yellow mix
  • 4 large eggs
  • 3 Tablespoons vegetable oil
  • 1 ¼ cups water
  • ½ cup sour cream

For the Milk Mixture:

  • 1 (14-ounce) can sweetened condensed milk
  • 1 (12-ounce) can evaporated milk
  • ¾ cup heavy cream
  • 1 teaspoon vanilla extract

For the Topping:

  • 1 cup heavy cream
  • 3 Tablespoons powdered sugar
  • 1 teaspoon vanilla extract
  • Ground cinnamon (optional)
  • Fresh strawberries, maraschino cherries, or toasted coconut (optional for serving)
Tres Leches Cake with Cake Mix

Steps

Tres Leches Cake with Cake Mix
  1. Preheat your oven to 350°F (175°C). Thoroughly coat a 9×13-inch baking dish with nonstick cooking spray, ensuring complete coverage to prevent sticking.
  2. In a stand mixer fitted with the paddle attachment, combine the cake mix, eggs, oil, and water. Mix on medium speed for 2-3 minutes until completely smooth. The batter should be uniform with no dry spots.
  3. Gently fold in the sour cream using a spatula. Don’t overmix – just fold until barely combined to maintain maximum fluffiness.
  4. Pour batter into the prepared pan and bake for 25-30 minutes. Test for doneness by inserting a toothpick in the center – it should come out clean with no wet batter.
  5. Allow cake to cool for 15-20 minutes. The cake should be completely cooled but still slightly warm when adding the milk mixture.
  6. While the cake cools, prepare the milk mixture by whisking together the sweetened condensed milk, evaporated milk, heavy cream, and vanilla until completely combined.
  7. Using a fork, poke holes across the entire surface of the cake, spacing them about 1 inch apart. This allows the milk mixture to penetrate evenly.
  8. Slowly pour half the milk mixture over the cake, allowing it to soak in completely (about 5 minutes). Then pour the remaining mixture. The cake will look very wet – this is correct!
  9. Cover and refrigerate for at least 1-2 hours, preferably overnight. The longer it chills, the more the flavors will develop.
  10. For the topping, chill your mixing bowl and beaters in the freezer for 10 minutes. This helps achieve the stiffest peaks possible.
  11. Beat the heavy cream, sugar, and vanilla on high speed until stiff peaks form (3-4 minutes). The cream should hold its shape when lifted with the beater.
  12. Spread the whipped topping evenly over the cake and sprinkle with cinnamon if desired. Serve with optional garnishes.
Tres Leches Cake with Cake Mix

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