Butterfinger Rice Krispie Treats Recipe: Nutty-Caramel Crunch in Every Bite

This Butterfinger Rice Krispie treats recipe delivers a nutty-caramel crunch that’ll make your taste buds dance. 💛 The secret? Swapping classic marshmallows for Butterfinger candy bars creates a rich, peanut-buttery flavor that transforms these treats into something extraordinary.

No baking required—just melt, mix, and press for a dessert that’s crispy on the outside and gooey inside.

Perfect for parties, potlucks, or satisfying a sweet craving, these treats combine the classic Rice Krispie texture with the bold peanut-butter flavor of Butterfinger bars. The result is a dessert that’s foolproof, addictive, and ready in under 30 minutes.

Whether you’re a beginner or a baking pro, this recipe guarantees a crowd-pleaser every time.

Ingredients for butterfinger rice krispie treats

Twelve ingredients transform into irresistible Butterfinger Rice Krispie treats with bold peanut-butter flavor.

The Butterfinger bars are the star—Nestlé or Hershey's work perfectly, but avoid off-brand that lacks the signature caramelized peanut flavor. Chop them into even 1/2-inch pieces for consistent texture; a food processor speeds this up. For the butter, Land O'Lakes or Plugrá brands melt smoothly without graininess. Mini marshmallows? Original or peanut-buttered both work, but avoid the chocolate-dipped variety—they burn easily. Stock up at Walmart or Target during back-to-school season when they're often on sale.

No Butterfinger bars? Crushed peanut butter cups (like Reese's) or chopped peanut butter cups create a similar effect, though the caramelized texture differs. Substituting regular marshmallows for mini? Cut them into quarters to mimic the size. The peanut butter must be creamy and unsweetened—Nutella or other sweetened versions overpower the balance. For a dairy-free twist, swap heavy cream for full-fat coconut cream, though texture will vary slightly. The powdered sugar dusting? Confectioners' sugar from Domino or C&H brands dissolves best.

Line your pan with parchment paper for easy release—no sticking guaranteed. Once pressed, these treats keep at room temperature for 3-4 days in an airtight container, though they're best enjoyed within 24 hours for maximum crispiness. For longer storage, freeze portions for up to 3 months—thaw at room temperature before serving. The powdered sugar dusting? Add it right before serving to prevent clumping. These reheat beautifully in the microwave for 10-15 seconds if they lose their crunch.

Step-by-step instructions for Butterfinger Rice Krispie treats

Here's the method to create perfectly crisp-edged, nutty-caramel treats with a satisfying crunch.

In a large, heavy-bottomed saucepan, combine the 0.5 cup unsalted butter (cut into small cubes) and 0.25 cup granulated sugar. Place over medium heat and let it melt completely, stirring occasionally with a wooden spoon. Once fully melted, increase heat to medium-high and bring to a gentle boil.

Watch closely as the mixture begins to bubble—this is when the sugar starts to caramelize. The moment it reaches a rolling boil (about 3-5 minutes), immediately remove from heat. The caramelized butter will be thick and golden, forming the flavor foundation for these treats. This step creates that signature buttery-caramel flavor that makes these treats irresistible.

In a separate medium bowl, whisk together the 0.25 cup heavy cream until it forms soft peaks (about 1 minute with an electric mixer). This adds airiness and prevents the treats from becoming too dense. Add the 1 tsp vanilla extract and 0.25 cup peanut butter, whisking until completely smooth and fully incorporated.

Next, pour the caramelized butter mixture into the whipped cream bowl. Using a wooden spoon, stir vigorously until the mixture is fully combined and slightly cooled (about 2 minutes). This creates a smooth, cohesive base that will bind all the ingredients together. The peanut butter adds depth, while the whipped cream ensures a lighter texture.

Return the saucepan to low heat and add the 6 cups mini marshmallows. Stir constantly with a wooden spoon until they are completely melted and the mixture becomes smooth and glossy (about 5-7 minutes). If the mixture starts to thicken too much, add 1 tablespoon water at a time to loosen it.

Remove from heat and stir in the 12 oz chopped Butterfinger candy bars and 0.25 tsp Diamond Crystal kosher salt. The salt enhances all the sweet, nutty flavors, while the Butterfingers add that signature caramelized peanut-butter crunch. Mix until the Butterfingers are evenly distributed and the entire mixture has a smooth, thick consistency—similar to warm peanut butter.

In a large mixing bowl, gently fold in the 6 cups Rice Krispies cereal using a rubber spatula. Work quickly but carefully to avoid breaking the cereal pieces. The goal is to distribute the cereal evenly without compressing it too much—this ensures each treat has that perfect crispy exterior and gooey interior.

While the mixture is still warm, lightly grease a 9x13-inch baking pan with the 2 tbsp melted unsalted butter (for greasing). Spread the mixture evenly into the pan, pressing down gently with a spatula to create an even layer. Use the back of a spoon to smooth the top—this makes cutting clean, uniform squares later.

Let the treats cool in the pan at room temperature for 30 minutes, then refrigerate for at least 1 hour (or up to 4 hours). This chilling step is crucial—it allows the treats to set firmly so they hold their shape when cut. If you're impatient, you can speed this up by placing the pan in the freezer for 20-25 minutes, but they won't be as crisp.

Once fully set, dust a fine-mesh sieve with 0.25 cup powdered sugar (for dusting) and lightly sift over the treats. This adds a beautiful finishing touch and balances the rich, nutty flavors. Use a sharp knife to cut into 24 even squares (about 2x2 inches each). Serve at room temperature for the best texture—crisp edges with a soft, gooey center in every bite.

Essential equipment for this recipe

Heavy-Bottomed Saucepan

A 3-quart stainless steel saucepan with a heavy base is my go-to for melting butter and sugar—it distributes heat evenly and prevents scorching. I swear by the All-Clad Stainless Steel Saucepan (around $40) for its durability, but a budget-friendly Cuisinart MultiClad Pro (about $30) works just as well.

Avoid thin, lightweight pans—they cause temperature fluctuations that can burn your mixture. 🔥

Mixing Bowls

Use a large, non-reactive mixing bowl (at least 8-inch diameter) for combining whipped cream and flavorings. I prefer glass or stainless steel—like the Pyrex Mixing Bowls (set of 3 for $25)—because they’re easy to clean and won’t retain flavors.

For folding in Rice Krispies, grab a wide, shallow bowl (like a 9x13-inch baking dish) to avoid spills. A rubber spatula (I use the OXO Good Grips) helps scrape every last bit of mixture. ✨

Wooden Spoons

Stirring melted marshmallows and Butterfingers requires a heat-resistant wooden spoon—I reach for a maple or hickory one (like the OXO Good Grips Wooden Spoon, $12) because they’re gentle on nonstick pans and won’t scratch your saucepan.

Avoid plastic spoons—they melt under high heat. Keep one handy for stirring the caramelized butter mixture too. 🌟

Rubber Spatula

A heat-resistant silicone spatula (like the OXO Good Grips Silicone Spatula, $10) is essential for folding in Rice Krispies without breaking them. Its flexible edge helps scrape the bottom of the bowl for zero wasted mixture.

Pro tip: Use it to press the treats into the pan evenly—just run it along the edges for a clean finish. 💪

9x13-Inch Baking Pan

An aluminum or stainless steel 9x13-inch pan (I love the Wilton Professional Baking Pan, $15) is non-negotiable for even cooking and easy release. Line it with parchment paper (cut to size) to prevent sticking—no greasing needed if you’re using parchment.

For extra insurance, lightly butter the parchment before pouring in the mixture. 🧈

Sharp Knife & Cutting Board

Cutting 24 perfect squares requires a sharp chef’s knife (like the Victorinox 8-inch, $20) and a sturdy cutting board. Dip the knife in hot water between cuts to prevent sticking—it glides through the treats like butter.

For cleaner edges, chill the pan for 30 minutes before cutting. A pizza wheel (like the OXO Good Grips, $15) works too if you’re cutting through multiple batches. 🔪

Frequently asked questions