*You can use any kind of M&Ms you'd like. I used the regular M&Ms for this recipe, but you can easily use mini M&Ms. [br]**If you're planning to serve these the same day you bake them, bake them for 22 minutes. If you're planning to serve them the following day, bake them for 20 minutes. If you bake them for 20 and then serve them immediately, they're going to be very gooey (perhaps that's not a bad thing?!), but they'll firm up by the following day. You don't want to over bake these brownies, so if you want to play it safe, bake them for 20 and know you're going to get some nice, gooey brownies out of the oven!