These Pumpkin Caramel Marshmallow Fluff Bars are gooey, sweet, and irresistible! These easy bars are sure to be devoured quickly.
I’m usually done with pumpkin after Thanksgiving, so I thought I’d sneak in one last pumpkin recipe in before my self-inflicted posting-about-pumpkin deadline. It’s a good one.
Pumpkin meets both caramel AND marshmallow fluff in these ooey gooey bars, and the result is sticky, sweet, decadent, and delicious. Somehow, these manage to taste vaguely like cinnamon rolls. It’s magical. These come together in one bowl and a few minutes, which always makes me happy (less dishes, more time! Wahoo!).
These bars are adapted from my Banana Nut Bars. The edges of these bars get dense and soft, while the middle stays fudgy and gooey. I used the new, reformulated I Can’t Believe It’s Not Butter, and the result was amazing. I love that it’s made from real, simple ingredients and is still unbelievably delicious! These bars were buttery, and stayed so soft and moist. I also LOVE that I can get it in stick form! It makes it so easy to use in baking.
Obviously, we haven’t talked about two of the stars of this show: caramel and marshmallow fluff! I use a thin dulce de leche as my caramel, but any kind of caramel sauce will work. I would stick to thicker varieties (I like Trader Joe’s Fleur De Sel Caramel) and avoid the “ice cream topping” caramel sauces.
And then we have fluff. Mmm…so good, but so sticky! I used a knife to dollop the fluff, and I highly suggest you grease the knife (or spoon, or whatever you’re using) before you start. It’ll save you a big ole sticky mess! The fluff will puff up and make beautiful swirls in your bars, just be careful not to swirl too much, you don’t want the fluff to be swirled into oblivion.
If you’re not sick of pumpkin yet, you’ll love these treats!! Enjoy :)

Pumpkin Caramel Marshmallow Fluff Bars
Ingredients
Instructions
- Preheat oven to 350°F. Line an 8-by-8-inch pan with aluminum foil or parchment paper and spray with cooking spray; set aside.
- Combine brown sugar and melted I Can’t Believe It’s Not Butter in a large bowl and whisk to combine. Add the egg, vanilla, and pumpkin. Whisk to combine. Add the flour, salt, cinnamon and nutmeg and stir until just combined, taking care not to over-mix.
- Pour 1/2 of the batter into prepared pan, smooth it out evenly. Using a greased knife or spoon, dollop half of the marshmallow fluff in teaspoons over the batter, swirl in with a knife. Drizzle half of the caramel sauce over the batter. Carefully top with the remaining batter. Repeat with remaining marshmallow fluff and caramel.
- Bake for 30 minutes, or until the bars are set and a toothpick comes out clean. Let cool completely before cutting.
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Oh my Rachel, this look just amazing! I love how ooey gooey they are. I can’t wait to make these!
OMG those sound so delicious, gooey and sweet!! Yummy! I bet these look even more delicious because of the dulce de leche. Love it ;-)
I love all pumpkin desserts – and this one looks especially good. Marshmallow fluff, carmel sauce and pumpkin – delicious. Thanks!
Gah, these look so great! The best things are always the messy gooey things. Love that you combined pumpkin, caramel, and marshmallow fluff! Such great fall flavors. Pinned! :)
Rachel, these look amazing! I love pumpkin and carmel and these are calling my name! Pinned. :)
Thanks for the kind words and the pin, Cyndi!
I’ve been thinking about adding a bar cookie to our Thanksgiving dessert buffet – this will be it! Looks amazing.
Hope you love them, Faith! Happy Thanksgiving!
Oh my goodness. These look so sticky and gooey. I want them in my life! My pumpkin deadline is also Thanksgiving. I better in the kitchen to whip these up!
Pumpkin with caramel and marshmallows? Genius idea, Rachel! Love these bars!
These bars look beautiful and would be perfect for Thanksgiving dessert.
Oh hello! These bars look AMAZING!