What a Cluster Bars

What A Cluster Bars | Cookies and Cups

Hey you guyeeeees!

So this week…

We’re going there.  And there.  Annnnd there.



It’s officially Ben and Jerry’s themed week!

You know Kristan and I love our themes…remember Brownie Batter Week?  Or Caramel Apple Week?  What about Valentine’s Week…and of course the most recent Candy Bar week (Bridget joined us on that one)?


And this week we’re going B&J.

We got this idea a while back after we both made Ben and Jerry’s treats in the same week without planning it (Late Night Snack Cookies and Chunky Monkey Brownies).  That happens sometimes when you share a brain with someone.

Annnd we’ve gathered some of our favorite girls to join us…I’m talking total superstars like Peabody, Julie and Heather.

Each day Kristan and I are going to be joined by one (or two) of these girls to bring you a dessert dedicated to one of our favorite Ben and Jerry’s flavors.  Which I am going to say was basically impossible to narrow down.  I mean…

Ben and Jerry's Week!

So in the word’s of my Grandpa, “Let’s get this show on the road”.

I’m starting the week off with “What a Cluster”.  Don’t you just love the titles of their ice creams?

It’s a peanut butter ice cream with crunchy caramel clusters, and swirled with marshmallow and peanut butter.  This one was a total no brainer for me.  Hello peanut butter.

So what I decided on was What A Cluster Bars….

What A Cluster Bars | Cookies and Cups

What we have here is a peanut butter blondie base, filled with a layer of Marshmallow Fluff, topped with caramel krispies.

Yeah, they’re as good as they sound.

Start by making your peanut butter blondie…

I threw in some peanut butter chips for good measure.
 photo IMG_0028_zps54602e92.jpgJust press it into your 9×9 and bake until the edges start to get golden.
 photo IMG_0033_zpsdcb46488.jpgLet those cool completely and then spread a nice layer of Marshmallow Fluff all over the top…
 photo IMG_0038_zps3fccd232.jpgNext up make your krispie layer and add a little caramel.
 photo IMG_0039_zpsf99abd9d.jpgDump that on top of the Fluff layer
 photo IMG_0050_zpsb7762c8f.jpgAnd press it down evenly…
 photo IMG_0066_zpsb53129e1.jpgThat’s it!

All the flavors of the yummy ice cream in one easy bar 🙂
What A Cluster Bars | Cookies and Cups

Now for the fun part!

Hop on over and see what Kristan did with Cherry Garcia (I hear there’s cake involved)

And check out Peabody’s Phish Food invention!  (I hear there’s PIE involved) My kids are gonna be all over that!



What a Cluster Bars

  • Author:


makes 20 squares


Blondie base

  • 7 Tbsp butter, melted
  • 1 cup light brown sugar
  • 1 egg + 1 yolk
  • 1 tsp vanilla
  • 1 cup flour
  • 1/2 tsp baking powder
  • 1 cup peanut butter chips


  • 1 cup Marshmallow Fluff

Krispie Topping

  • 2 Tbsp butter
  • 2 cups mini marshmallows
  • 1/4 cup caramel sauce
  • 3 cups krispie cereal


  1. Preheat oven to 350°
  2. Line a 9×9 pan with foil and spray with cooking spray.
  3. In bowl of stand mixer beat together melted butter, brown sugar, whole egg, yolk and vanilla until smooth.
  4. Turn speed to low and add in flour and baking powder until batter comes together and is combined. Fold in peanut butter chips.
  5. Press in to prepared pan and bake 20 minutes until edges just begin to golden.
  6. Allow to cool completely.
  7. When cool spread Marshmallow Fluff evenly on top of blondie.
  8. Prepare your krispies next in a medium sauce pan. Melt butter over low. Add in marshmallows, stirring until melted. Remove from heat and stir in caramel sauce.
  9. Next add krispie cereal and stir until coated.
  10. Pour krispie mixture onto Fluff layer and press evenly. Allow to krispie layer to cool for 15 minutes and cut into squares.


Leave a Reply

63 Comments on "What a Cluster Bars"

Sort by:   newest | oldest | most voted
Peabody (Culinary Concoctions By Peabody)

I’m so making these for my hockey team. They will LOVE.

Averie @ Averie Cooks

I love everything about these, Shelly!

PB chips, blondie base, Fluff, RKTreats, caramel – you took just about all the elements of fave desserts of mine and rolled them into one. I could use one or four right about now 🙂


You just made this week 10xxx better!!!! Loving this idea Shelly!!!

Oh and these bars are insane!! I love everything in them!! Please send some my way!


I am obsessed with these. OBSESSED.

Cookbook Queen

Theme weeks are always my favorite!! I’m so excited to see what else you make this week.

I don’t know what I’d do without you and your mad bar skills. These look fab!!

tracy {pale yellow}

I’m glad you and Kristin share a brain, you come up with the most genius ideas! These look fantastic! I can’t wait for the rest of the week holds.


Sounds like a super fun week – these bars sound amazing!


…just wanted to make sure you guys knew that The Domestic Rebel had a fantastic Ben and Jerry’s week… last week!

I thought that her posts were fantastic, and it wouldn’t be right to not mention it. The timing and overlap of ideas is impeccable, and as a reader I’m pretty happy about having two sets of weeks in a row… woohoo for Ben and Jerry’s and beautiful baked goods! 😀

All That

It is so fun when you guys do your theme weeks. These look amazing!

Julianne @ Beyond Frosting

These are great! When I lived in Vermont, I worked down the street from their factory in Waterbury, and it was SO hard to drive by there all the time and resist the urge to stop for a scoop of ice cream. The Oatmeal cookie was my pint of choice for “pint night” in college- hense the freshman 15. Can’t wait to see what you guys come up with!

Belinda @themoonblushbaker

I am so excited you have paired up with all my favourite dessert bloggers. I may not know many Ben Jerry flavour(living in Australia) but I am sure you guys can help me recreate the experience at home.

These. bars. make. now!

Katrina @ Warm Vanilla Sugar

This idea is so fabulous!! Love!

Brian @ A Thought For Food

HA! I think this is such a fun idea! I grew up with all the B+J flavors in our house (my parents are kind of addicted to ice cream… which isn’t a bad thing to be addicted to). These look so awesome!

Leah | So, How

Oh this is so fun! I love Ben & Jerry’s ice cream! I can’t wait to read about all the creations! Those bars sound so good.

Erin @ The Spiffy Cookie

YESSS definitely my favorite ice cream. I need these. And totally love this theme.


Goodness! These look incredible! I’m always on the lookout for desserts that don’t have chocolate as my mother-in-law is allergic. I’ll be making these for her the next time she visits I’m sure!


Oh Heavens to Betsy. These are so dreamy! Peanut butter + marshmallow is the new dessert trend and I’m so happy about it! My waist? Not so much, but who cares?

I’m excited for what this week holds!


These look heavenly. I love everything about these!

Elizabeth @ Dishing up Delicious

Happy Monday indeed! I love this ice cream, and these look incredible. What’s not to love?


I bet the texture of these bars are just perfect! My mouth is watering! These are a must make! Thanks!
I’m excited to see what’s next!

Katie @ Butterlust Blog

I’m just going to roll through life with these in one hand and a pint of Ben & Jerry’s in the other.

Melissa @ Treats With a Twist

Love anything PB. And B&J are the best. I’ve always wanted to make some killer treats based off their flavors! Perfect Round 1, Shelly 🙂

Georgia @ The Comfort of Cooking

You make the BEST looking bar desserts, Shelly! I want these so bad!

Colette @ JFF!

Look @ those happy li’l PB chips….
or is it ME who’s happy? 😉

Nikki @Seeded at the Table

Yay for theme week! These can definitely make an appearance in my home. 🙂 I love B&J’s so much so that in college I ate an entire pint while watching an episode of 24. It was 10PM and I felt the need to run off all 800 calories so I went to the gym. Yeah, wouldn’t do that now…I”ll just keep the 800 cals and forget running! 🙂

Annie @ Annie

This is a genius theme week! Ben and Jerry’s can do no wrong. So pumped to see what else you have planned.

bridget {bake at 350}

A blondie base?!? Krispie topping?

I’ve never heard of What a Cluster, but I’m going to be on a mad hunt for it. And make these bars in the meantime!


Valerie | Pursuit of Sweetness

GIRRRRRL. These look ah-maz-ing! I’ve never tried that flavor of Ben & Jerry’s before but the flavor combo sounds perfect 🙂 AND I just can’t get enough marshmallow lately!


This week is definitely going to be a testament to how little Ben and Jerry’s I’ve eaten in my life…and how i need to get more of it onto my thighs! I mean, er…into my belly? This flavor sounds awesome as do the bars to go with it!


Wow…All my favorite flavors! I make something very, very similar called peanut chewy bars. Very old recipe…cookie type base, mini marshmallow layer (heated in oven just till they puff), then cover with a peanut rice crispy topping. Salty sweet at it’s finest. I will love these too!


Oh. My. God. Ben and Jerry’s week?! Can’t wait!

Sommer @ ASpicyPerspective

Holy Heavens! These look good!


Seriously – this is going to be the best week ever. And these are such a great way to start it all off!


This is going to be the best week ever! And this is such a great way to start it all off!


a) Marry me?
b) These get to be at our wedding reception, right? And the after-party? And maybe the alter?
c) If neither b nor c…cater my wedding? LOVE these!


What a fun idea to do Ben & Jerry’s ice cream flavours! and actually, I’d never heard of What a Cluster. They do come up with the best names…


oh my family would love these!! this would be great to whip up and serve our help when we move!!

Erin @ Dinners, Dishes, and Desserts

I love your theme weeks, and this is going to be one of my favorites! I love the flavor combos that B&J come up with. These bars look heavenly!

Sylvie @ Gourmande in the Kitchen

Wow you packed these with all kinds of great flavors!

Kelly Senyei | Just a Taste

These look incredible! How can you beat salty, sweet AND crunchy?! Yum!

Heather @ Snookie

What a great spin on Rice Crispy Treats! The look great!

Rosie @ Blueberry Kitchen

Love the idea of Ben and Jerry’s week! These look so yummy!

Diane {Created by Diane}

thinking of these will keep me up at night, they look yummy!

Em @ Persnickety Pineapple

These look absolutely delicious. I would have never thought to combine good old rice crispie squares with blondies! Great bake sale idea too.

Interior Design Services

Yummy recipe. Actually looks so delicious. I will try to make it in tomorrow.

Emily @ Life on Food

Oh my goodness! Never had the ice cream but now I must find it. These sound so delicious. Makes perfect sense to have these on hand since I feel like my life is a bit of a cluster now.


Salted caramel sauce will still taste okay, right?


oh shoot…and how about doubling? 🙂 Thanks!


I wanted to make these but only have Dark Brown Sugar on hand, is that ok? or do I need the light brown sugar?

Tracie Anzaldi

You mention that the blondie is a peanut butter blondie and your photo shows peanut butter, but there are only chips in the recipe…is that correct?