-In a large bowl whisk together 1/2 cup (100g) golden granulated sugar, 3/4 cup (150g) dark brown sugar with 1tsp of salt and 1/2 cup (115g) of butter, room temperature until a smooth paste is formed
-Whisk in 1 egg and 1 tsp vanilla until smooth and ribbons fall from the whisk
-Sift in 2 cups (250g) of plain flour and 1/2 tsp of bicarbonate of soda (baking soda) fold all of that together with a spatula, don't over mix

• then add 1/2 cup semisweet chocolate drops and 1/2 cup of milk or dark chocolate drops and mix until combined
  I chill mine over night and then bake at 180°C (350°f/ gas 4) for 10-12 mins. The mix makes about 18 cookies but they can be made smaller or bigger just remember to adjust the cooking time :)
  The dough can also be adapted for vegans, i use an egg substitute and vegan butter and it doesn't change how they come out too much at all. My sister loves the vegan version and she eats the dough raw too.
  I also use a hand mixer for this recipe, hope this is helpful :)