01 - Preheat oven to 350°F. Line two baking sheets with parchment paper.
02 - In a mixing bowl, cream together the butter and sugar until light and fluffy, about 2-3 minutes.
03 - Beat in the egg, vanilla extract, and balsamic vinegar until smooth.
04 - In a separate bowl, whisk together the flour, baking powder, baking soda, and salt.
05 - Gradually add the dry ingredients to the wet mixture, mixing just until combined.
06 - Gently fold in the diced strawberries.
07 - Scoop tablespoon-sized portions of dough, roll into balls, and coat each ball in granulated sugar.
08 - Place dough balls 2 inches apart on the prepared sheets.
09 - Bake for 11-13 minutes, or until edges are set and cookies are lightly golden.
10 - Let cookies cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely.