Preheat your oven to 350° degrees. Spray a 9x13 pan with nonstick spray.
In your mixer, add the butter and cream cheese. Mix until just combined.
Add the sugar. Mix on medium high for 5 minutes.
It will be light and creamy.
Add the vanilla.
And the eggs, mix on low until combined.
Add the flour, baking powder, baking soda, and salt. Mix until combined.
Spread the cookie batter into the sprayed 9x13 pan.
Squeeze or spoon the strawberry jam into a swirling "S" pattern on top of the batter.
Use a butter knife and swirl the strawberry jam into the batter.
Bake at 350° for 40 minutes, until the edges start to brown.
Let cool about 30 minutes before serving. It is delicious cold too.