Line a 9”x13” cake pan with parchment paper, and lightly coat the sides and corners with butter or non-stick spray.
Slice strawberries into quarters and set aside in a small bowl.
In a large bowl, beat butter, salt, and 1½ cups sugar until fluffy.
Add egg, yolk, vanilla, milk and mix until combined. Mix well, but it's fine if small chunks remain.
Beat in the baking powder and ensure even distribution.
Scrape down the bowl and beat in the flour until just combined.
Spread the batter into the prepared pan. Arrange the strawberries as snugly as you can fit them into the batter.
Sprinkle top with remaining 3 Tbsp sugar and bake for 45-48 minutes or until toothpick comes out clean. Eat fresh or top with cream and strawberries.