In a large bowl, beat together sugar and butter until creamy. Mix in eggs, baking powder and salt. Alternate between adding in the flour and milk, beating after each addition. Beat until all ingredients are combined. Stir in vanilla extract.
Pour batter evenly into a greased and floured 9" x 13" baking dish. Bake for 18-20 minutes until a toothpick comes out clean. Do not over-bake. Cake should be flat and light in color. Set aside to cool completely.
Slice strawberries and set aside.
In chilled metal bowl, whip whipping cream until stiff peaks form.
In separate bowl, cream together cream cheese and powdered sugar until smooth. Scrape the whipped cream into the cream cheese mixture bowl and keep folding gently until combined.
Evenly spread cream mixture over top of cooled cake. Top with sliced strawberries.