Bar cookies are also travel friendly. You can leave them in the pan and cut them when you get to the party (whether it's across town or in your backyard), or you can stack them (with waxed or parchment paper in between layers). They're sturdy, rarely break, and make a great foundation for a scoop of ice cream.
Bon Appétit has a few of the standbys, like blondies and brownies, but there are also Lemon Cheesecake Squares with Fresh Berries (above), Gingerbread Bars, and a twist on lemon squares—Coconut-Lime Bars with Hazelnut Shortbread Crust. Hm, those sound a little bit like these.
• See the slideshow: Bar Cookies at Bon Appétit
What are your favorite bar cookies?
Related: Recipe: Coconut Jam and Banana Bars
(Image: Yoko Inoue for Bon Appétit)