Rocky Mountain Avalanche Bars are part rice krispies treat, part peanut butter fudge, and part white chocolate bark. These totally addicting bars are perfect for a holiday cookie platter or for an easy treat any time of the year!

stacked rocky mountain avalanche bars

If you are from the West or have spent much time visiting the Western states, you probably have been in or at least heard of the Rocky Mountain Chocolate Factory. It's a sweet shop that started in Durango, Colorado but has spread throughout a bunch of other states.

An image of copycat Rocky Mountain Chocolate Factory Avalanche Bars made with white chocolate, peanut butter, marshmallows, and mini chocolate chips.

I just cannot resist those huge windows filled with rows of gourmet caramel apples, homemade fudge, and chocolate covered pretzels.

And the smell of the freshly made caramel and melted chocolate that wafts out is a siren call to my soul.

Rocky Mountain Chocolate Factory used to be one of our go-to date night stops when Paul and I were in law school. We would choose a treat (often an apple pie caramel apple) and split it for dessert.

So when I was thinking about a dessert to include for Colorado Week in my American Eats series where I'm sharing well-known foods from each state, one state at a time, I decided I needed to share these Rocky Mountain Avalanche Bars.

An image of copycat Rocky Mountain Avalanche Bars with plenty of marshmallows, peanut butter and white chocolate, and mini chocolate chips.

They are a fan-favorite item sold at the Rocky Mountain Chocolate Factory stores and with the combination of peanut butter, white chocolate, rice krispies, and marshmallows, it's easy to see why!

An image of two white chocolate peanut butter rice krispie treats stacked on top of each other.

It's super easy to make the Rocky Mountain avalanche bars at home, which is a good thing if you don't live close to one of their stores and because they are pretty pricey.

Like, you can make an entire batch of these delicious bars for less than the cost of one at the store. Kind of a no-brainer, right?

I'm obsessed with the textures of these bars. There is the almost-but-not-quite fudge-like of the creamy peanut butter and white chocolate, which contrasts with the crunchy rice krispies and the soft, fluffy marshmallows that add a chewy element. Avalanche bars kind of have it all.

An image of the ingredients for making homemade Rocky Mountain Avalanche Bars.

How to Make Rocky Mountain Avalanche Bars

  1. Start by melting chopped white chocolate.  The double boiler method works, or you can just do it in the microwave by using short bursts of 50% power and stirring every 30 seconds.
  2. Stir the peanut butter into the melted white chocolate until smooth.  Pour over the rice krispies and stir to coat, then let cool for a few minutes before adding the mini chocolate chips and marshmallows.
  3. Gently press into a buttered 9x13-inch pan, then cool stick the bars in the fridge for 15 minutes until set before cutting into squares.
A step-by-step collage of how to make copycat Rocky Mountain Chocolate Factory Avalanche Bars.

Tips for Rocky Mountain Avalanche Bars

  • Chop actual bars of white chocolate rather than using white chocolate chips. The bars melt so much better and easier than white chocolate chips which are actually made with ingredients that are intended to help the chips hold their shape rather than melt well.
  • For a variation that is more rice krispie treat (albeit not the gooey, chewy kind) and less fudge, double the amount of rice krispies to 6 cups. The other remaining ingredients can handle the increased cereal amount enough to coat the additional rice krispies.
  • For a stronger hit of peanut butter, you can double the amount of peanut butter to 1 cup without altering any of the other ingredients. I think the balance is perfect as written, but if you have a huge peanut butter lover you are trying to please, then go for it!
An image of peanut butter and white chocolate rice krispie treat bars with extra marshmallows and mini chocolate chips.

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Rocky Mountain Avalanche Bars

4.96 from 22 votes
Amy Nash
Prep Time 10 mins
Additional Time 30 mins
Total Time 40 mins
Course Dessert
Cuisine American
Servings 32 bars
Rocky Mountain Avalanche Bars are part rice krispies treat, part peanut butter fudge, and part white chocolate bark.  These totally addicting bars are perfect for a holiday cookie platter or for an easy treat any time of the year!

Ingredients
  

  • 4 cups white chocolate chopped (about 24 ounces)
  • ½ cup creamy peanut butter
  • 3 cups rice krispies
  • 3 cups mini marshmallows
  • ½ cup mini chocolate chips

Instructions
 

  • Melt the white chocolate in a microwave on 50% heat in 30 second bursts, stirring between each burst, until melted.
  • Stir the peanut butter into the melted white chocolate until combined, then pour over the rice krispies in a large bowl and gently stir to coat.  Cool for 10 minutes, stirring once or twice until the melted chocolate is no longer warm to the touch.
  • Fold in the marshmallows and mini chocolate chips, then gently press into a 9x13-inch pan lined with a parchment paper sling or buttered on the bottom and sides.  Refrigerate until set, about 15 minutes, then cut into squares.

Notes

Adapted from Cookies & Cups.

Nutrition

Calories: 152kcal | Carbohydrates: 19g | Protein: 2g | Fat: 8g | Saturated Fat: 4g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 2g | Trans Fat: 1g | Cholesterol: 4mg | Sodium: 53mg | Potassium: 77mg | Fiber: 1g | Sugar: 15g | Vitamin A: 186IU | Vitamin C: 2mg | Calcium: 38mg | Iron: 1mg
Tried this recipe? Show me on Instagram!Mention @HouseOfNashEats or tag #houseofnasheats!

More States I Have Visited in my American Eats Series

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About the author

Hi, I'm Amy

I enjoy exploring the world through food, culture, and travel and sharing the adventure with mostly from-scratch, family friendly recipes that I think of as modern comfort cooking.

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Reader questions and reviews

  1. 5 stars
    There used to be a Rocky Mountain Chocolate Factory near me. They are gone now. Did they all go out of business? These bars were one of my favorite things to get there. Thanks so much for the recipe. Now I can make them at home.

  2. 5 stars
    How did I miss these at the Rocky Mountain Chocolate Factory??? I never seemed to venture past there amazing candy coated apples!! 😉 You can bet these Avalanche bars will be making an appearance in my kitchen, STAT!

  3. 5 stars
    The name of these are so fun, but what's in 'em even more so! They would disappear so fast if I had them on a platter over the holidays!!

  4. Found this recipe on pinterest. Pinned! These look AMAZING! I had never heard of avalanche bars then googled them after I found your pin...apparently they are a whole thing I'm missing out on. Yum!

  5. Love this recipe! It was a big hit when I made it for the nurses at my dad's SNF. I will definitely make this again and again.

  6. Double the peanut butter for SURE. I don’t use choc chips as an ingredient and it comes out like peanut butter fudge with a light crunch.... SO GOOD!

  7. I had a Peanut Butter Avalanche Bar at Whole Foods the other day, and it was amazing. So I started a serious search to find a recipe so I could replicate it at home. Your recipe with the suggestion to double the amount of rice krispies seemed closest to what I had at the store.

    So, I made the recipe following all the instructions, but I did double the cereal and the peanut butter. These came out amazing and are delicious and rich. I am sending a big batch with my daughter to work tomorrow and will be eager to hear the reviews.

    However, I did notice that they came out a little bit crumbly when i cut them into squares. So, I am wondering if the increase in rice krispies needed something else increased to help keep them together? Any thoughts on this? What if we melted some mini marshmallows with the white chocolate and peanut butter to help create a better glue???

    1. Yes, if you wanted to increase the rice krispie ratio to make it closer to a rice krispie treat, it would work to melt extra marshmallows to help them stick together more. I would do the marshmallows first (probably 3-4 cups) with a couple tablespoons of butter, just like I was making regular rice krispie treats, then once those were molten, I would add the white chocolate chips and let the heat from the marshmallows melt the chocolate and peanut butter.