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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 9×13-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.

More Great Dessert Bar Recipes You’ll Enjoy

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stacked rocky mountain avalanche bars
Yield: 32 bars

Rocky Mountain Avalanche 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!

Prep Time 10 minutes
Additional Time 30 minutes
Total Time 40 minutes


  • 4 cups white chocolate, chopped (about 24 ounces)
  • 1/2 cup creamy peanut butter
  • 3 cups rice krispies
  • 3 cups mini marshmallows
  • 1/2 cup mini chocolate chips


  1. Melt the white chocolate in a microwave on 50% heat in 30 second bursts, stirring between each burst, until melted.
  2. 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.
  3. 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.


Adapted from Cookies & Cups.

Nutrition Information:



Serving Size:


Amount Per Serving: Calories: 176Total Fat: 10gSaturated Fat: 5gTrans Fat: 0gUnsaturated Fat: 4gCholesterol: 4mgSodium: 56mgCarbohydrates: 21gFiber: 0gSugar: 17gProtein: 3g

All nutritional information is based on third party calculations and is only an estimate. Each recipe and nutritional value will vary depending on the brands you use, measuring methods and portion sizes per household.

More States I Have Visited in my American Eats Series

Alabama • Alaska • Arizona • Arkansas • California • Colorado • Connecticut • Delaware • Florida • Georgia • Hawaii • IdahoIllinoisIndianaIowa • KansasKentuckyLouisiana • MaineMarylandMassachusettsMontanaNew YorkOregonPuerto RicoSouth CarolinaSouth DakotaTexasUtahWisconsin