Preheat your oven to 350°F. Grease and flour a 9x13-inch baking pan.
In a medium bowl, whisk together flour, baking powder, and salt.
In a large bowl, beat the butter and sugar together until light and fluffy.
Add the eggs one at a time, mixing well after each, then stir in the vanilla.
Alternately add the dry ingredients and the milk to the wet mixture, starting and ending with the flour. Stir until just combined.
Pour the batter into the prepared pan and smooth the top.
Bake for 28–32 minutes or until a toothpick comes out clean. Let it cool completely.
While the cake bakes, toss sliced strawberries with 2 tablespoons sugar in a bowl. Let them sit to release juices.
In a cold bowl, whip the heavy cream and powdered sugar until soft peaks form.
Cut cooled cake into squares, top with strawberries and a dollop of whipped cream. Enjoy!