Preheat your oven to 350°F (175°C).
In a large mixing bowl, cream together the softened butter and granulated sugar until light and fluffy.
Add the egg, vanilla extract, and pureed strawberries to the butter and sugar mixture. Mix until well combined.
In a separate bowl, whisk together the flour, baking powder, and salt.
Gradually add the dry mixture to the wet ingredients, mixing until just combined.
Using a cookie scoop or tablespoon, drop rounded balls of dough onto a baking sheet lined with parchment paper.
Bake in the preheated oven for 10-12 minutes, or until the edges are lightly golden.
Allow the cookies to cool on the baking sheet for 5 minutes before transferring to a wire rack.
