Preheat your oven to 350°F (175°C).
In a bowl, whisk together the flour, baking powder, and salt.
In a separate bowl, cream the softened butter, cream cheese, and granulated sugar together until smooth.
Add the egg and vanilla extract to the creamed mixture and mix until combined.
Gradually mix the dry ingredient mixture into the wet ingredients until just combined.
Gently fold in the diced strawberries until evenly distributed throughout the dough.
Drop rounded tablespoons of dough onto a lined baking sheet, spacing them about 2 inches apart.
Bake for 12-15 minutes, or until the edges become lightly golden.
Let the cookies cool on the baking sheet for 5 minutes before transferring them to a wire rack.
Once cooled, dust the cookies with powdered sugar before serving.