Easy Berry Cake with Lemon Whipped Cream

Name: Easy Berry Cake with Lemon Whipped Cream
Ingredients: 1 1/2 cups (7½ ounces/213 grams) all-purpose flour; 1 1/2 teaspoons baking powder; 1/2 teaspoon table salt; 8 tablespoons unsalted butter , softened; 3/4 cup (5¼ ounces/149 grams) plus 2 tablespoons sugar , divided; 2 large eggs plus 1 large white, room temperature; 1 teaspoon vanilla extract; 1/3 cup whole milk , room temperature; 10 ounces (283 grams/2 cups) mixed blackberries , blueberries, and/or raspberries; 1 cup heavy cream , chilled; 1 1/2 tablespoons sugar; 1 teaspoon grated lemon zest plus 1 teaspoon juice