Whether we’re talking cookie bars, brownies, or blondies, the ease of whipping up some bars for dessert is unbeatable. A bowl, a pan, and an oven, and you’re ready to get baking! These one-batch wonders run the gamut from uber-healthy to deliciously decadent, and their simple preparation is ripe for experimentation. We’ve rounded up 20 yummy bars from the Web that have us swooning, but we’re hoping you’ll roll up your sleeves with us and try out your own take on these recipes.

1. Pumpkin Cookie Bars with Butterscotch Chip Streusel: Pumpkin, cookie, and butterscotch all in the same sentence? Consider us in love. (via This Gal Cooks)

2. Peanut Butter and Caramel Cookie Bars: These cookie bars are soft and delicious, and we’re loving the PB and caramel combo. Please don’t make us count calories on this one. Peanut butter is protein, right? (via Baking Joy)

3. Snickerdoodle Pumpkin Bars: Your favorite sugar cookie meets fall. We can’t wait to try this blend of snickerdoodle and pumpkin. It looks super easy to make, too. Win! (via Life and Kitchen)

4. Whole Wheat Rhubarb Strawberry Crumb Bars: Who doesn’t love rhubarb? Use the rest of yours before they go bad. These bars are (sort of) healthy and way, way yummy. Score! (via The Iron You)

5. Magic Oreo S’mores Bars: Another magical sugar combo: Oreo and s’mores. This one is perfect to bring to any camping weekend or late summer bonfire party. (via The Sunny Side of Life)

6. Gooey Nutella Cookie Bars: Move over, chocolate chips! Did you know you can use some good old Nutella to whip up crazy-good baked treats? Try this one to prove our point. (via Butter Baking)

7. Chocolate Mint Cookie Bars: Chocolate shortbread covered in whipped mint ganache, which is then covered in a dark chocolate glaze. Need we say more? (via Baking a Moment)

8. Lime Dream Bars: Take your brownies to the next level! These sweet treats add some lime to white chocolate brownies and the result is, well, a dream. (via The Spiced Life)

9. Blueberry Crumb Bars: Bust out the blueberries for these decadent bars. (via Erika Follansbee)

10. Peaches ’n Cream Bars: Nothing goes together quite like peaches and cream. (Queue our favorite rap song from the late 90s.) Bring the killer combination to your cookie bar with this recipe. (via Sally’s Baking Addiction)

11. Butterfinger Fudge Cookie Bars: Butterfingers are one of our favorite candy bars, and we have to admit we’re intrigued by bringing the candy to the cookie. (via Skinny not Skinny)

12. Triple Chocolate Rocky Road Brownies: This might be the ultimate Rocky Road recipe—it calls for chocolate marshmallows and chocolate covered almonds! Wowza, that’s some serious chocolate. (via SugerHero!)

13. Sugar Cookie Bars: Sugar cookies in bar form with an explosion of sprinkles? Yum! We’re all about anything that’s both sweet and colorful. (via Creme de la Crumb)

14. Chocolate Rolo Bars: Rolos have been inspiring us in the kitchen for years, and we’re loving this cookie bar take. Make sure you have a glass of water nearby, those things are sticky! (via Bakerita)

15. Cookies and Cream Bars: Soft, fudgy, and Oreo-y, these bars are a must-have for your baking arsenal. (via SugarHero!)

16. Golden Coconut Bars: Summer may be over, but coconut is always in season. Try this recipe to bring back a bit of sunshine in your life. (via Magnolia Days)

17. Oatmeal Raisin Honey Bars: On the healthier end of the spectrum, these bars channel the deliciousness of the classic oatmeal raisin cookie and the results are phenomenal. (via Rise and Shine)

18. Trail Mix Cookie Bars: Oh trail mix, how we love thee. This recipe uses classic trail mix staples (pretzels, yogurt covered raisins, etc.) to create a killer salty-sweet combo. (via My Kitchen Addiction)

19. Citrus Cheesecake Bars: The citrus flavor keeps these bars light, while the cheesecake makes them taste decadent. (via The Sweet Life)

20. Raspberry Lime Bars: The green and red color combo is almost as awesome as the fruity flavor mix. Saving this one for Christmas! (via The Kitchen Paper)

Are you drooling over any of these recipes? Got any cookie bar/brownie/blondie recipes to share? Tell us in the comments below!