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tres leches flag cake
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5 from 1 vote


Strawberry Tres Leches Cake is made with a boxed cake mix, 3 milk syrup, and topped with whipped cream and fresh berries! This tres leches cake recipe is a simple way to create a traditional dessert without all the effort but all of the flavor.
Prep Time1 hour
Cook Time35 minutes
Chill4 hours
Total Time5 hours 35 minutes
Course: Cake, Dessert
Cuisine: American, Mexican
Servings: 18 slices
Calories: 456kcal


Three milks

  • 12 oz evaporated milk
  • 14 oz sweetened condensed milk
  • ½ cup heavy cream


  • 15.25 oz vanilla cake mix
  • 1 cup all-purpose flour
  • 1 cup granulated sugar
  • 1 cup milk
  • ½ cup vegetable oil
  • 1 tbsp vanilla extract
  • 4 large eggs

Whipped Cream

  • 2 cups heavy cream
  • ½ cup powdered sugar
  • 1 tsp vanilla extract


  • Blueberries
  • Strawberries



  • Preheat the oven to 350 degrees F. Spray a 9x13 pan with non stick spray and set aside.

Cake batter

  • In a large mixing bowl, combine the dry cake mix, flour, sugar, vanillaextract, eggs, milk, and vegetable oil. Mix with an electric mixer until nolumps remain.
  • Proceed to pour the cake batter into the prepared pan and bake in the ovenfor 30-35 minutes.
  • Let cool completely on the countertop or place it into the fridge for aspeedier process.

Milk mixture

  • Add all three milks into a medium-sized mixing bowl and whisk together tocombine. Place into the fridge until ready to use and the cake has cooled completely.

Whipped cream recipe

  • Pour heavy cream into the bowl of an electric mixer. Mix on high for 4-6 minutes, until cream has thickened and stiff peaks form.
  • Add powdered sugar to the cream.  For more sweetness add more powdered sugar until satisfied. Place into the fridge until ready to use.


  • Make sure cake is completely cooled. Poke holes all over the cake with a fork.
  • Pour the three milk mixture slowly over the cake. You can add more or less depending how moist you want the cake.
  • Spread the whip cream evenly over the cake.

To make an American flag cake:

  • Wash the blueberries and strawberries well, make sure all stems are removed.
  • Then, thinly slice the strawberries.
  • Start decorating by adding the blueberries to the upper left side of yourrectangular cake, covering a section about 3 inches across and 2 inches down.
  • Use the sliced strawberries to line the cake to help hold the blueberries ontop of the cake. Leave a 1-inch space and then make 3 full lines of strawberries across thecake.
  • Place remaining whipped cream in a piping bag to pipe the white lines of the flags. A 1M star tip or any decorative tip would be fine.
  • Pipe small star-shaped bits of cream in the spaces between the strawberries.
  • Place back into the fridge so the cake has time to absorb the three milks. It's best overnight but if you are in a rush for at least 4-5 hours. Serve & enjoy!


Strawberry Tres Leches Cake is made easily with a boxed cake mix and additional ingredients! This tres leches cake recipe is so delicious, your family and guests will devour it quickly! 


Serving: 1slice | Calories: 456kcal | Carbohydrates: 55g | Protein: 8g | Fat: 23g | Saturated Fat: 11g | Polyunsaturated Fat: 4g | Monounsaturated Fat: 6g | Trans Fat: 1g | Cholesterol: 92mg | Sodium: 245mg | Potassium: 233mg | Fiber: 1g | Sugar: 40g | Vitamin A: 678IU | Vitamin C: 1mg | Calcium: 212mg | Iron: 1mg