Use a pizza cutter to cut these. Makes it so easy. To make spreading the dough in the cookie sheet easier; spray hands with cooking spray and press out, use a spatula to spread, or use the butter wrapper to spread it out in the cookie sheet. The bag (about 10 oz) of mini m&m's comes with about 1 1/2 cups of m&m's inside of it. I just use the whole bag. It's less than the 2 cups called for. So, use 1-2 cups of the m&m's. Whatever you prefer. These need to cool for an hour so they can set and come together. You can eat them warm and gooey, but to make cutting easy and so they'll hold up, let them cool completely. When they come out of the oven they will look gooey but I promise they will come together as they cool.