Soft M&M Chocolate Chip Cookies

"This is my new favorite recipe for chocolate chip cookies. They're soft, buttery, and this version is loaded with milk chocolate M&Ms and semi-sweet chocolate chips. The cookies are thick enough to sink your teeth into, and are so very soft and moist. There's a hint of chewiness at the base and edges, and it's just enough to balance the softness and give me what I'm looking for in a perfect chocolate chip cookie. The secret to these cookies is instant vanilla pudding mix. Although they won't have quite the same texture or taste, substitute with cornstarch if you don't have pudding mix. The cookies are larger than some and the batch makes 15 cookies. The baking time of 11 minutes works perfectly with this size cookie, and if you alter the size of the cookie, you will need to alter the baking time. The dough must be chilled before baking so the cookies don't spread and bake thin and flat. For a classic chocolate chip cookie, use 1 1/2 to 2 cups semi-sweet chocolate chips, and omit the M&Ms...."