Step back in time with a cherished holiday classic! These retro **no-bake peanut butter marshmallow squares** are incredibly easy to make, irresistibly delicious, and remarkably freezer-friendly. This makes them the perfect candidate for preparing in advance and tucking away, ready to delight friends and family during any festive occasion. Their simple charm and delightful flavor guarantee they’ll become a treasured part of your dessert repertoire.
While countless variations of **peanut butter marshmallow bars** (sometimes referred to as butterscotch marshmallow squares) exist, this particular recipe stands out as a true favorite. It boasts a robust peanut butter flavor profile, delivering a taste experience akin to rich peanut butter fudge generously studded with fluffy marshmallows. The unique combination creates a sweet, salty, and wonderfully chewy treat that appeals to all ages.
Why You’ll Adore These Peanut Butter Marshmallow Squares
These delightful no-bake treats are more than just a simple dessert; they offer a host of benefits that make them a go-to for busy bakers and dessert enthusiasts alike. Here’s why these peanut butter marshmallow squares will quickly become a cherished recipe:
- Effortless Preparation: No Baking Required! Forget about preheating ovens and precise baking times. This recipe simplifies dessert making to its core. You simply melt a few key ingredients on the stovetop and then combine them with the marshmallows. This minimal-fuss approach means less time in the kitchen and more time enjoying your delicious creation. It’s truly one of the easiest **no-bake dessert recipes** you’ll find, perfect for beginner cooks or those seeking a quick sweet fix.
- Perfect for Make-Ahead & Freezing: Your Ultimate Holiday Treat. Planning for a party or holiday gathering can be stressful, but these **make-ahead peanut butter squares** alleviate some of the pressure. They boast exceptional keeping qualities, staying fresh in the refrigerator for two weeks or even longer, and remaining perfectly delectable in the freezer for up to three months. This longevity makes them an ideal candidate for holiday baking, allowing you to prepare them well in advance and simply thaw when ready to serve.
- Irresistible Sweet & Salty Flavor: A Crowd-Pleasing Delight. Prepare for an explosion of flavor! These squares offer the quintessential balance of sweet and salty, a combination that is universally loved. The rich, creamy peanut butter blends harmoniously with the distinct notes of butterscotch and the soft sweetness of marshmallows. Every bite delivers a satisfying chewiness and a delightful burst of nostalgic taste. This makes them an absolute crowd-pleaser, guaranteed to be a hit at any gathering or as a cozy snack.
Essential Ingredients for Your No-Bake Creation
Crafting these delectable **no-bake peanut butter marshmallow squares** requires just a handful of readily available ingredients. Quality ingredients ensure the best flavor and texture, so here’s a closer look at what you’ll need and some helpful tips for each:
Marshmallows: For the best results, use fresh, plain mini marshmallows. Their smaller size ensures they melt and combine evenly with the peanut butter mixture, creating that signature soft and chewy texture. While plain marshmallows are traditional, don’t hesitate to experiment with colored mini marshmallows if you’re feeling festive. This can transform your squares into vibrant “peanut butter confetti squares,” adding a fun visual twist without altering the classic flavor too much. Avoid stale marshmallows, as they may not melt as smoothly.
Butterscotch Chips: This recipe calls for 2 cups of butterscotch baking chips, which typically equates to around 320g or 11oz. It’s important to note that product sizing can vary by region. For instance, in some areas like Canada, a standard bag of butterscotch chips might only contain 270g due to shrinkflation, meaning you might need two bags to reach the required 2 cups. Always check the package weight! If you’re short on butterscotch chips, you can try to make up the difference with a small amount of milk chocolate chips or white chocolate chips, though this will slightly alter the classic butterscotch flavor profile. While using a single 270g bag will likely still work, the delicate balance between the butterscotch and peanut butter flavors will be subtly different. These chips are crucial for achieving the unique, caramel-like sweetness that complements the peanut butter so well.
Peanut Butter: The heart of this recipe! I’ve always achieved fantastic results using regular smooth, creamy peanut butter (brands like Jif work wonderfully). Its consistent texture helps create a smooth base for the squares. However, if you’re a fan of added texture, crunchy peanut butter works perfectly well and will introduce a delightful nutty crunch to each bite. A word of caution: I haven’t tested this recipe with natural peanut butter, which tends to separate and have a different consistency due to less added sugar and oil. If you do opt for natural peanut butter, ensure it’s well-stirred to prevent an oily separation in your final product.
Butter: Butter serves as a key binding agent and contributes to the rich, decadent texture of these squares. Your choice between salted and unsalted butter will influence the final flavor. Using salted butter creates a wonderful sweet and salty dynamic, enhancing the overall taste experience by cutting through the sweetness. If you prefer a purely sweeter treat, unsalted butter is the way to go. Either way, ensure your butter is fresh to impart the best possible flavor.
Step-by-Step Visual Guide
Seeing the process can make all the difference. Follow these visual steps to guide you through making your perfect peanut butter marshmallow squares.
- First, prepare your baking pan: Lightly spray or butter a 9×9-inch baking pan. Line it with parchment paper, ensuring it covers the bottom and two opposing sides, with a slight overhang to act as handles for easy removal later. Set the prepared pan aside.
- Place all your mini marshmallows in a large mixing bowl. This bowl should be spacious enough to allow for easy folding once the peanut butter mixture is added. Set this aside.
- In a medium-sized saucepan, combine the butterscotch chips, peanut butter, and butter. Place the saucepan over medium heat on the stovetop. Stir the mixture continuously as it melts to prevent scorching and ensure even heating.
- Continue heating and stirring until the mixture is completely smooth and all the chips are melted and integrated. Once smooth, immediately remove the saucepan from the heat. Allow the mixture to cool for 10-15 minutes, stirring occasionally. It’s crucial that the mixture cools down enough so you can comfortably place your hand on the bottom of the pan; this prevents the marshmallows from melting completely when combined.
- Once the peanut butter mixture has cooled sufficiently, pour it over the mini marshmallows in the large bowl.
- Using a large spoon or spatula, gently fold the marshmallows into the peanut butter mixture. Stir carefully until all the marshmallows are evenly coated. The goal is to coat them without fully melting them, preserving their chewy texture.
- Transfer the coated marshmallow mixture into your prepared baking pan. Gently smooth and level the top with your spoon or spatula.
- Refrigerate the pan for at least 1 hour, or until the squares are completely set and firm. For the first 15 minutes, you can leave them uncovered in the fridge. Afterward, if not cutting immediately, cover them loosely with foil to prevent them from drying out. Once firm, remove the pan from the refrigerator, use the parchment overhang to lift the entire slab of squares out onto a cutting board. Slice into 16 even squares using a large, sharp knife, pressing straight down for clean cuts.
Expert Recipe Tips for Success
Achieving perfect **no-bake peanut butter marshmallow squares** is simple with a few key tips in mind. These pointers will help you get the best texture and ensure your squares turn out beautifully every time:
- Choosing the Right Pan Size: The recipe specifically recommends a 9-inch square pan, which yields squares of ideal thickness. If you don’t have one, an 8-inch square pan or a 7×11-inch brownie pan will also work. Be aware, however, that these alternative sizes will result in thicker squares. While still delicious, the proportions of the peanut butter mixture to marshmallow might feel slightly different. A parchment paper sling (lining the bottom and two sides with overhang) is highly recommended for easy removal and clean cuts.
- Mastering the Cooling Step: This is perhaps the most crucial tip for a successful batch of **peanut butter marshmallow bars**. After melting the peanut butter mixture, it is absolutely essential to let it cool sufficiently before adding the marshmallows. The ideal temperature is when you can comfortably place your hand on the bottom of the saucepan for a few seconds (typically 10-15 minutes of cooling, with occasional stirring). Pouring a hot mixture over marshmallows will cause them to melt instantly, resulting in a dense, sticky slab rather than distinct, chewy marshmallow bits. Stirring the mixture occasionally during cooling helps it cool down evenly and prevents a skin from forming on top.
- Gentle Folding for Texture: When combining the cooled peanut butter mixture with the marshmallows, use a gentle folding motion. Over-mixing or aggressive stirring can cause the marshmallows to break down too much. The goal is to evenly coat them while preserving their individual shape and chewiness, ensuring that delightful textural contrast in every bite.
Making Ahead, Storing, and Freezing
One of the greatest advantages of these **no-bake marshmallow squares** is their incredible versatility for make-ahead preparation. This makes them an ideal dessert for holiday seasons, potlucks, or simply having a sweet treat on hand whenever a craving strikes.
Storage in the Refrigerator: These squares keep exceptionally well in the refrigerator. Store them in an airtight container to maintain their freshness and prevent them from absorbing other odors from the fridge. Properly stored, they will remain delicious for at least two weeks, if not longer. For best results, consider layering the squares with parchment paper to prevent sticking.
Freezing for Long-Term Enjoyment: For extended storage, freezing is an excellent option. Once the squares are completely set and cut, wrap them tightly individually or in layers separated by parchment paper in an airtight freezer-safe container or heavy-duty freezer bag. They can be frozen for up to three months without losing their quality. When you’re ready to serve, simply remove them from the freezer. They will thaw quickly on the counter within 20-30 minutes, or you can transfer them to the refrigerator overnight for a gradual thaw. Freezing makes these squares perfect for last-minute entertaining or a convenient treat whenever you desire.
Peanut Butter Marshmallow Squares Recipe
A delightful retro holiday classic, these peanut butter marshmallow squares are incredibly easy to prepare, wonderfully delicious, and freeze beautifully, making them ideal for early preparation and hassle-free enjoyment.
Prep Time: 5 mins
Cook Time: 10 mins
Cooling Time: 1 hr 15 mins
Total Time: 1 hr 30 mins
Yield: 16 servings
Ingredients
- 4 cups (240 g) mini marshmallows (plain or colored)
- 2 cups (320 g) butterscotch chips (11 oz. – see Note 1 below)
- 1 cup (250 g) peanut butter (see Note 2 below)
- ½ cup (113 g) butter (see Note 3 below)
Instructions
- Spray or lightly butter a 9×9-inch baking pan, then line with a sheet of parchment paper that covers the bottom and two sides, over-hanging the sides slightly to use as handles to remove later. Set aside.
- Place marshmallows in a large bowl and set aside.
- In a medium saucepan on the stovetop over medium heat, melt the butterscotch chips, peanut butter, and butter, stirring regularly until smooth. Remove from heat and allow to cool, stirring occasionally, until you can place your hand comfortably on the bottom of the pan (10-15 minutes).
- Pour the cooled peanut butter mixture over the marshmallows. Use a large spoon to gently fold marshmallows into the peanut butter mixture until fully coated.
- Spread the marshmallows into the prepared pan and gently jiggle the pan to help settle the marshmallows. Refrigerate for at least 60 minutes, until the mixture has fully set. (You can place them into the refrigerator uncovered initially, but cover with foil once they have cooled for 15 minutes, especially if not cutting right away.)
- Run a knife along the two uncovered edges of the pan, then carefully lift from the pan by grabbing the parchment paper handles. Place onto a cutting board. Using a large, sharp knife, cut into 16 even squares. Make sure to use a large knife that allows you to slice straight down, rather than dragging across the bars.
- These squares will keep in an airtight container in the refrigerator for at least 2 weeks, or in the freezer for up to 3 months.
Notes
- Note 1 (Butterscotch Chips): In some regions like Canada, butterscotch chips are commonly sold in 270g packages, which is slightly less than the 2 cups needed for this recipe (approximately 50g short). You will need to purchase two packages to ensure you have the full 2 cups. Bulk stores often allow you to buy the exact amount required. In a pinch, one package will still work, but the flavor balance will be slightly altered. In the US, popular brands often still come in 11oz (311g) packages, which should be sufficient.
- Note 2 (Peanut Butter): Smooth peanut butter is preferred for a creamy texture, but crunchy peanut butter can be used for added texture. This recipe has not been tested with natural peanut butter, which may have different binding properties due to less added stabilizers and oils.
- Note 3 (Butter): Using salted butter will yield a delightful sweet and salty treat. For a purely sweeter flavor, opt for unsalted butter.
- An 8×8-inch or 7×11-inch pan can be used, but the resulting squares will be thicker. Adjust chilling time if necessary.
Nutrition Information
- Serving: 1 serving
- Calories: 258 kcal
- Carbohydrates: 35 g
- Protein: 4 g
- Fat: 12 g
- Saturated Fat: 5 g
- Polyunsaturated Fat: 2 g
- Monounsaturated Fat: 4 g
- Trans Fat: 0.2 g
- Cholesterol: 17 mg
- Sodium: 226 mg
- Potassium: 111 mg
- Fiber: 1 g
- Sugar: 26 g
- Vitamin A: 199 IU
- Calcium: 9 mg
- Iron: 0.3 mg
Cuisine: Canadian
Course: Snack, Dessert
Author: Jennifer Maloney
This recipe has been thoughtfully adapted from a classic by Rosie Daykin, bringing a timeless treat to your kitchen.
More Delicious Peanut Butter Recipes You’ll Love!
If you’re a fan of the rich, nutty goodness of peanut butter, you’re in for a treat! Explore these other fantastic recipes that celebrate this versatile ingredient, offering more no-bake options and delightful baked goods perfect for any occasion.