1 1/2 teaspoons baking powder
1/2 teaspoon salt
1 stick unsalted butter, at room temperature
1 1/2 cups all-purpose flour
3/4 cup granulated sugar
2 large eggs, at room temperature
1 teaspoon vanilla extract
1/2 cup strawberry-flavored milk, at room temperature
6 strawberries, hulled
2 cups confectioners' sugar
1/2 cup unsweetened cocoa powder
1 stick unsalted butter, at room temperature
1/2 cup heavy cream
3 strawberries, hulled and halved lengthwise