Copycat BLOX Skippy Bar Recipe – The Ultimate Peanut Butter Lover’s Treat

Copycat BLOX Skippy Bars! The most delicious peanut butter bars with rich chocolate butter—just like the original, but easy to make at home. So addictive!

Copycat BLOX Skippy Bar Recipe

Peanut butter lovers, get ready to lose your minds.

If you’ve tried a BLOX Skippy Bar, you already know the obsession is real. That soft, chewy peanut butter base, that layer of peanut butter, and then a layer of silky-smooth chocolate buttercream—it’s pure dessert bliss.

I had to recreate it.

I reworked my Biscoff Bar to create the copycat BLOX Skippy Bar recipe that tastes just like the original. It’s so ridiculously good. Like, hide-these-in-the-back-of-the-pantry good.

Let’s make them!

What Are BLOX Skippy Bars?

If you’re not familiar with BLOX, here’s the scoop: BLOX was the best treat company in American Fork, Utah – known for thick, decadent dessert bars made with high-quality ingredients. The Skippy Bar was their OG peanut butter-chocolate masterpiece and the one bar they kept weekly, no matter the time of year or what else was on the menu.

Let’s Make Skippy Bars!

Step 1: Prep Your Pan

Spray a 9″x13″ metal pan with nonstick spray and then line with parchment paper, leaving a bit of overhang for easy removal later. Spray the parchment too. Preheat the oven to 325 degrees F.

Step 2: Make the Peanut Butter Oat Cookie Base

Combine the butter and peanut butter in a large mixing bowl. Beat until smooth.

Add the brown sugar, granulated sugar, and vanilla and mix until fully combined.

Beat in the eggs until well-incorporated.

Stir in the flour, baking soda, and salt, followed by oats. Press the dough firmly into the prepared pan and bake for about 20 to 25 minutes.

NOTE: It’s okay if the dough sinks a little in the pan when it’s cooling. That’s actually what it’s supposed to do.

Let cool completely before adding toppings.

Step 3: Make the Chocolate Buttercream

In a microwave-safe bowl, combine the chocolate chips and heavy cream. Microwave in 30-second intervals, stirring between each, until fully melted and smooth. Set aside.

In a medium size mixing bowl beat the butter and the cooled ganache until smooth.

With the mixer on low, gradually add the powdered sugar, vanilla and salt. Beat on medium-high until smooth and silky.

Step 4: Top the Bars

Once the bars are cooled completely, spread 1 cup of peanut butter over the top of the bars, followed by the chocolate buttercream.

Tips for Success

• Use Skippy peanut butter if you want it to taste just like BLOX. Natural peanut butter won’t give the same texture.
• Don’t skimp on the oats—it helps create that chewy texture.
• Serve at room temperature for a soft and chewy bite!

How to Store

Store in an airtight container in the fridge for up to 1 week. Or freeze for up to 2 months—just thaw to room temperature before eating.

Final Thoughts

This Copycat BLOX Skippy Bar recipe is everything you love about the original—rich, chewy, salty-sweet perfection. Whether you’re a die-hard BLOX fan or just a peanut butter-chocolate addict (me too!), these bars are guaranteed to be a new favorite.

If you try them, I want to see! Tag me on Instagram @cakebycourtney and use the hashtag #CakeByCourtney so I can drool over your creations.

Happy baking! 💛

Copycat BLOX Skippy Bars

5 from 2 votes

A delicious peanut butter and oat-filled blondie bar with a slather of peanut butter on top and chocolate buttercream.

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Ingredients

  

For the Bars

• 2 3/4 cups (330 g) all-purpose flour
• 1 teaspoon (4 g) baking soda
• 1 teaspoon (3 g) salt
• 1 cup (226 g) unsalted butter, room temperature
• 1 cup (250 g) Skippy peanut butter
• 1 1/4 cups (275 g) brown sugar, packed
• 1 cup (200 g) granulated sugar
• 2 eggs
• 1 teaspoon (4.2 g) vanilla extract
• 2 1/2 cups (255 g) old-fashioned rolled oats

For the Chocolate Buttercream

• 5 oz dark chocolate chips
• 2 tablespoons (28 g) heavy whipping cream
• 1 cup (226g) unsalted butter, slightly cold
• 2 1/2 cups (312.5 g) powdered sugar, measured then sifted
• 1/2 teaspoon (2.1 g) vanilla extract
• 1/4 teaspoon salt

Garnish

• 1 cup (250 g) Skippy peanut butter
• Reese's peanut butter cups, diced

Instructions

 

For the Bars

• Preheat your oven to 325 degrees F. Prepare a 9”x13” metal baking dish by spraying the bottom and sides with nonstick spray. You can also want to line the bottom and side with parchment paper and spray again. Set aside. NOTE: you can use a glass baking dish but the bars will take a few minutes longer to bake and the edges might not be as crunchy.
• In a medium size mixing bowl, whisk together the flour, baking soda, and salt. Set aside.
• In the bowl of an electric mixer fitted with the paddle attachment, or with a hand beater, beat the butter and peanut butter until smooth.
• Add the brown sugar and granulated sugar and mix on medium-high speed for about a minute, making sure to scrape down the sides and bottom of the bowl as needed.
• Add the vanilla and eggs and beat until well mixed.
• Stir in the flour mixture on low speed and mix until no streaks of flour remain.
• Fold in the oats.
• Put the batter into the prepared pan. It will be a thick batter, similar to cookie dough, but a little stickier. Evenly press the batter into the pan and bake for 20 to 25 minutes.

  NOTE: you want it to be slightly underdone in the center – and don't worry if it sinks a little when cooling. That's meant to happen.
• Remove the pan from the oven and allow to cool completely before adding the buttercream.

For the Buttercream

• In a microwave safe bowl, heat the heavy cream and chocolate in 30 second increments until smooth (stirring in between round). Set aside to cool slightly.
• In the bowl of an electric mixer fitted with the paddle attachment, or with a hand mixer, beat the butter and ganache until smooth.
• With the mixer on low, gradually add the powdered sugar, followed by the vanilla and salt. Turn the mixer to medium-high speed and beat until light and fluffy, about 2 to 3 minutes. Be sure to scrape down the sides and bottom of the bowl as needed.
• Spread the peanut butter on top of the bars and then pipe or spread the chocolate buttercream on the peanut butter.

Course: Dessert

Cuisine: Bars

Keyword: BLOX, Peanut Butter Bars, Skippy Bars