Party Cake

This light, sweet cake suits any celebration, but I especially like to make it during strawberry season. You can use all-purpose flour, if you like, but using cake flour ensures a soft texture and delicate crumb.

2¼ cups cake flour
1 Tbs baking powder
½ tsp kosher salt
1¼ cups buttermilk (or whole milk)
4 large egg whites
1 stick unsalted butter, at room temperature
1½ cups sugar
1 pint (or more) strawberries
1 pint (or more) heavy cream
confectioners' sugar, to taste

1. Place a rack in the center of t...