01 -
Preheat the oven to 180°C (350°F). Line a cookie sheet with baking paper or a silicone mat.
02 -
Thaw the frozen blackberries in a microwave or on the stove. Puree using an immersion blender and set aside to cool. Ensure you have ½ cup of blackberry puree.
03 -
In a medium mixing bowl, cream the butter and sugar using an electric mixer until light and fluffy. Add the cooled blackberry puree and vanilla extract, then beat until well combined.
04 -
In a separate bowl, whisk together the flour, baking soda, and salt. Gradually stir the dry mixture into the blackberry mixture by hand until just combined.
05 -
Fold in the chocolate chips, reserving ¼ for topping the cookies after baking.
06 -
Cover the dough and chill in the fridge for at least 30 minutes to firm up.
07 -
Roll tablespoonfuls of dough into balls and place them on the prepared cookie sheet. Press down slightly on each ball, then bake for 8-10 minutes, or until the edges are set.
08 -
Cool the cookies on the tray for a few minutes, then press the reserved chocolate chips onto each cookie. Transfer to a wire rack to cool completely.