Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.

In a large mixing bowl, combine the white sugar and softened butter, then beat until light and creamy.

Crack a large egg into the mixture and beat in the fresh strawberry puree until fully blended.

Sift in the all-purpose flour, baking powder, and salt, and stir until just combined.

In a shallow bowl, combine white sugar and red colored sugar if using, then roll the cookie dough into balls and coat them.

Place the dough balls on the prepared baking sheet, flatten slightly, and ensure even spacing.

Bake for 10-15 minutes until lightly browned around the edges and soft in the center, then cool on a wire rack.