World Peace Cookies
Sift the flour, cocoa and baking soda together.
In a large bowl, beat the butter on medium speed until soft and creamy.
Add both sugars, the salt and vanilla extract and beat for 2 minutes more.
Pour in the flour and mix at low speed just until the flour disappears into the dough.
Toss in the m & m's and mix only to incorporate.
Turn the dough out onto a work surface, gather it together and divide it in half.
Working with one half at a time, shape the dough into logs that are 4 cm in diameter.
Wrap the logs in plastic wrap and refrigerate them for at least 3 hours.
Center a rack in the oven and preheat the oven to 160°C. Line two baking sheets with parchment or silicone mats.
Working with a sharp thin knife, slice the logs into rounds that are 1 cm thick.
(The rounds are likely to crack as you’re cutting them don’t be concerned, just squeeze the bits back onto each cookie.)
Arrange the rounds on the baking sheets, leaving about 3 cm between them.
Bake the cookies one sheet at a time for 12 minutes.
Transfer the baking sheet to a cooling rack and let the cookies rest.