Grease the baking trays if you aren’t using a liner.
For the cookies:
In a stand mixer or hand mixer, beat the butter and sugars together on high. Beat in the egg
On slow, mix in the flour. On very slow (or by hand), mix in the chocolate polka dots. Carefully mix in the dried raspberries, slightly crushing if using whole ones
You will have a ball of dough to put in a plastic bag or wrap in clingfilm. Chill in the fridge for about an hourYou can leave it overnight if necessary
Preheat the oven to 190°C/ 170°C fan/ gas mark 5/ 375°F
Pinch dough from the ball and roll into a small ball in your hands. Use about the size of a heaped teaspoonfulYou will make about 18 cookies
Make the balls slightly taller than wide and slightly flatten on top. Put on the baking sheet leaving plenty of space between
Cook for 12-15 minutes until barely beginning to brown at the edges. Check after 12 minutes - they will continue to cook out of the oven
Remove from the oven and leave on the baking sheet for 10 minutes. Transfer to a wire cooling rack.