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

In a mixing bowl, whisk together the flour, baking soda, and salt.

In another bowl, cream together the softened butter, brown sugar, and granulated sugar until light and fluffy.

Add the egg and vanilla extract, mixing until well combined.

Gradually add the dry ingredients to the wet ingredients, mixing until just combined.

Fold in the mashed raspberries and chocolate chunks gently.

Using a cookie scoop, drop dough onto the prepared baking sheet, spacing them about 2 inches apart.

Bake in the preheated oven for 10-12 minutes, or until the edges are lightly golden.

Allow to cool on the baking sheet for 5 minutes before transferring to a wire rack to cool completely.