As the headline suggests, bar cookies are pretty much unparalleled when it comes to baking for a crowd, whether for your kid's bake sale, a potluck feast, or a casual backyard barbecue. Easy to make, crowd-pleasing, and simple to scale into large batches, these 24 options are sure to satisfy.
Source: Nicole Perry
Caramel Nut Bars
A canny combination of walnuts, almonds, and pecans joins forces with a salty honey caramel and a shortbread base for a nutty bar cookie  you don't want to miss.
Reese's Peanut Butter Cup Blondies
Reese's Peanut Butter Cup blondies  . . . enough said.
Snickerdoodle Bar Cookies
These bars are like an inside-out snickerdoodle cookie  — the spice (in this case pumpkin-pie spice) is in the filling.
Marshmallow Cereal Treats
Use your favorite cereal — we vote for Golden Grahams — to make these ultrasimple marshmallow treats .
Apricot Crumble Bars
Almond icing, a buttery shortbread base, apricot preserves, and just the right amount of crumble topping make these bars  a perfect 10.
Crumbly, butter-rich bar cookies  made from only six ingredients? It doesn't get much better than that!
Pumpkin Cream Cheese Bars
Since the frosting is swirled in before baking, these marbled bars  are a great option for transporting to a party or sending in the mail. (No need to worry about the frosting getting mangled in transit.)
If you make just one recipe out of the bunch, these chewy, sprinkle-studded funfetti blondies  ought to be it.
Made with pistachio paste — a cousin to almond paste — these chewy green bars  are ideal for nut fans.
Coconut Chocolate Rice Krispies Treats
Coconut and chocolate chips  add a grown-up touch to Rice Krispies Treats.
Cashew Fig Bars
Part energy bar, part oatmeal cookie, these chewy cashew-butter- and fig-based bars  are a lovely, less-indulgent option.
We're not exaggerating when we claim that these may be the richest, fudgiest brownies in all the land .
Pumpkin Streusel Cheesecake Bars
No need to decide between making a cheesecake, pie, or a crumble; these pumpkin bars  combine the best components of each.
Apple Pie Bars
Apple crumble bars  are like pie for crust-lovers, though they pack in plenty of apple filling too.
Pumpkin Bars With Cream Cheese Frosting
For a low-fuss way to get your pumpkin fix, make cream-cheese-frosted pumpkin bars .
Lucky Charms Treats
Channel two childhood favorites — Lucky Charms cereal and Rice Krispies treats — by combining the two into a festive marshmallow treat .
Maple Butterscotch Blondies
These blondies  aren't messing around: packed into each salty, chewy bite are pecans, white chocolate, and butterscotch chips, all topped off with a maple drizzle.
Most lemon bars only use the citrus fruit's tart juice, but these pack double the flavor  by also incorporating the zest into the shortbread base.
Slutty brownies  aren't for the faint of heart; this decadent recipe combines chocolate chip cookies, Oreos, brownies, chocolate ganache, and rainbow sprinkles.
Salted Brown Butter Blondies
As you might imagine, these salty brown butter blondies  are pretty amazing thanks to their chewy texture, a generous dose of butter, and tasty mix-ins (blond chocolate and toasted pecans).
Caramel Apple Bars
A buttery shortbread base, salty-sweet caramel apple slices, and a pecan-oat crumble combine for one epic bite .
Rice Krispies Treats
Two small tweaks — doubling the butter and adding a generous dose of salt — take ordinary Rice Krispies treats to the next level .
Peppermint Bark Brownies
For the ultimate quick-fix sweet , add pieces of peppermint bark to brownie mix.
Pink Lemonade Bars
Combine two childhood favorites — pink lemonade and lemon bars — into one mouth-puckering treat .