Tres Leches Cake with Fresh Berries

Ingredients

• Cooking spray
• 1 ½ cups all-purpose flour
• ¾ teaspoon baking powder
• ½ teaspoon kosher salt
• 6 large eggs
• ¼ teaspoon cream of tartar
• 1 cup granulated sugar, divided
• ⅓ cup vegetable oil
• ¾ cup whole milk, divided
• 2 teaspoons vanilla extract, divided
• 1 (12 oz) can evaporated milk
• 1 (14 oz) can sweetened condensed milk
• 2 cups heavy whipping cream
• 2 tablespoons powdered sugar
• 3 cups mixed fresh berries (such as blackberries, blueberries, and raspberries)

Steps

1. Preheat oven to 350°F. Coat bottom only of 13- x 9-inch baking dish with spray. Combine flour, baking powder, and salt in small bowl. Separate eggs; place yolks in large bowl and whites in separate large bowl.
2. Add cream of tartar to egg whites; beat with electric mixer until foamy. Add ½ cup granulated sugar in batches, beating continuously, until whites are opaque and glossy, sugar has dissolved, and stiff peaks have formed.
3. Add oil, ¼ cup whole milk, 1 teaspoon vanilla, and remaining ½ cup granulated sugar to egg yolks. Beat until blended, then stir in flour mixture until thick batter forms. Stir (fold) egg white mixture into batter in batches until no streaks remain. Spread batter gently into baking dish. Bake 18–22 minutes until top of cake is golden and center is set. Let stand to cool completely in dish.
4. Combine evaporated milk, sweetened condensed milk, and remaining ½ cup whole milk. Ladle mixture over cooled cake in batches, letting each addition absorb before adding more. Cover and chill until ready to serve.
5. Beat heavy cream, powdered sugar, and remaining 1 teaspoon vanilla until very stiff peaks form. Spread whipped cream evenly over cake. Top with fresh berries. Serve.