Peanut Butter Cup Smores in 20 Minutes

Making the Best Peanut Butter Cup Smores

The smell of scorched sugar and melted chocolate fills the kitchen the second that marshmallow hits the broiler. It's that specific, toasted aroma that usually requires a campfire and a lot of patience, but you can get it in minutes. I remember trying these over a real fire once, but I messed up the heat.

The chocolate liquefied instantly and slid off the cracker like melted wax, leaving me with a sticky mess on my fingers.

That failure taught me that the broiler is actually a better tool. You get a consistent, mahogany char on the marshmallow without the base turning into a puddle. By swapping plain chocolate for a peanut butter cup, you add a savory edge that stops the treat from being too sweet.

You can expect a snack that hits every note: the snap of the graham cracker, the molten center of the marshmallow, and the rich, salty hit of peanut butter. It's a simple upgrade that feels fancy but takes almost no effort.

What Makes This Work

• Thermal Bridge: Placing the peanut butter cup on the cracker first creates a shield. The cracker absorbs some of the heat, so the chocolate softens without completely evaporating.
• Salt Balance: The peanut butter introduces a salty element that balances the heavy sugar in the marshmallow and graham cracker.
• High Heat: Using a broiler instead of a standard oven creates a quick sear, leaving the inside of the marshmallow molten while the outside stays crisp.

The Right Tools

Minimal equipment is required, though a couple of tools simplify the process. A heavy rimmed baking sheet is essential to prevent melted chocolate from dripping into your oven. I prefer a metal skewer for the marshmallows since it won't burn under the broiler like wood would.

Using a kitchen torch is even faster and provides total control over the char. Otherwise, ensure your broiler rack is positioned in the upper third of the oven.

Ingredient Breakdown

The peanut butter cup is the hero here. I chose it because a standard chocolate bar often tastes one dimensional when paired with marshmallows. The peanut butter adds a creamy, savory layer that changes the whole profile.

If you use a generic brand, you might find it too sweet; a high-quality cup with more cocoa helps keep the flavors grounded.

Graham crackers provide the structural snap. If they're too stale, they crumble. Fresh ones hold the weight of the molten toppings. The marshmallows need to be the large, standard size to ensure you get that molten center.

Recipe Details

• Prep time:15 minutes
• Cook time:5 minutes
• Total time:20 minutes
• Yield: 12 s'mores

Ingredients and Substitutes

• 6 full sheets honey graham crackers Why this? Provides a sweet, crisp base that holds the weight. (Substitute: Digestive biscuits for a saltier, denser crumb)
• 6 standard size (1.5 oz / 42g) peanut butter cups Why this? Adds the essential salty sweet contrast. (Substitute: Almond butter cups for a nuttier taste)
• 6 large (1 oz / 28g) marshmallows Why this? Creates the gooey, melted center. (Substitute: Marshmallow fluff, though the texture is less charred)
• 1 pinch (1g) flaky sea salt Why this? Sharpens the chocolate and peanut butter flavors. (Substitute: Fine table salt, but use less)
• ½ tsp (2.5ml) melted butter Why this? Helps the salt stick and adds a rich finish. (Substitute: Coconut oil for a subtle tropical note)

The Assembly Process

Phase 1: The Foundation

Preheat your oven broiler to high. Line a baking sheet with parchment paper to avoid a sticky cleanup. Break your graham crackers into 12 squares and lay them out. Place one half of a peanut butter cup in the center of each square.

Phase 2: The Precision Char

Skew each marshmallow. Hold it 3-4 inches below the broiler flame. Rotate the skewer constantly. Watch for the surface to turn a deep mahogany color. The center should feel heavy and molten. This usually takes about 1-2 minutes per marshmallow.

Phase 3: The Final Assembly

Immediately slide the charred marshmallow off the skewer and onto the peanut butter cup. Cap the assembly with a second graham cracker square. Press down gently. You'll feel the chocolate yield as the heat from the marshmallow melts it.

Phase 4: Finishing Touches

Brush a tiny bit of melted butter over the top cracker. Sprinkle a pinch of flaky sea salt over the top. Serve them immediately while the centers are still bubbling.

Fixing Common Issues

If your marshmallow collapses, it's typically because the skin became too thin due to over charring. You're aiming for a golden exterior, not a burnt one. If the peanut butter cups aren't melting, they may be too chilled; allow them to warm up for 10 minutes before beginning.

When the treat slides apart, it is often because the marshmallow is too moist or the graham cracker is too smooth. Firmly pressing the top cracker helps keep everything secure.

Adjusting the Batch

To make a smaller batch, simply cut the ingredients in half and use a small toaster oven tray. The cooking time remains the same, though you should be careful not to crowd the squares.

When preparing these for a large group, work in batches of six. Prepping 24 marshmallows at once means the first few will cool before they can be capped with crackers. In these cases, I suggest lowering the broiler temperature slightly and increasing the time to avoid burning the initial batch while finishing the rest.

Storage and Scraps

These are meant to be eaten hot. Once the marshmallow cools, it loses that molten quality and becomes chewy. If you must save them, keep them in a cool spot for a few hours. I don't recommend the fridge, as it makes the graham cracker soft.

For zero waste, take any broken graham cracker shards and crush them up. Mix them with a bit of melted butter and sugar to make a crumble for yogurt or ice cream.

Adding Your Twist

To change the nutty profile, try using homemade peanut butter cups for a bolder taste. For extra crunch, press a few pretzel twists into the marshmallow before capping it with the cracker.

If you want a similar treat that doesn't require a broiler, my no bake cookies feature a comparable peanut butter and chocolate base that works well for meal prep. For a healthier alternative, substitute the honey graham crackers with a whole grain variety, although you will sacrifice some of the traditional sweetness.

Serving Your Treats

Serve these treats alongside a chilled glass of whole milk to balance the richness. A cup of dark roast coffee is also an excellent choice, as its bitter notes offset the sweetness.

I prefer presenting them on a wooden platter accompanied by a few fresh strawberries. The berries' natural acidity helps refresh your palate between bites of rich chocolate and marshmallow. For an extra touch, try adding a small amount of raspberry jam to the peanut butter cup before topping it with the marshmallow.

For additional nutritional information regarding these ingredients, you can visit USDA FoodData Central.