Deluxe Baked Marshmallow Peanut Butter Rice Krispies Squares Bar

Dive into decadence with these Deluxe Baked Marshmallow Peanut Butter Rice Krispies Squares Bars—a rich, chewy, and slightly crunchy treat that's irresistibly indulgent! This elevated twist on the classic dessert combines gooey melted marshmallows, creamy peanut butter, and crispy Rice Krispies cereal, all baked to perfection for a lightly golden finish. Topped with melty semi-sweet chocolate chips, crunchy roasted peanuts, and a sprinkle of flaky sea salt for a gourmet touch, these bars are the ultimate sweet-salty snack. Easy to prepare in just 30 minutes, they’re perfect for bake sales, parties, or a simple indulgence at home. Each bite delivers layers of texture and flavor—sticky, nutty, chocolaty, and utterly delicious. Make these deluxe bars your go-to for a crowd-pleasing dessert!

Nutriscore Rating: 44/100

Prep Time:20 mins

Cook Time:10 mins

Total Time:30 mins

Servings: 12

Ingredients

• 6 tablespoons Unsalted butter
• 10 cups Mini marshmallows
• 1 cup Creamy peanut butter
• 1.5 teaspoons Vanilla extract
• 0.5 teaspoons Salt
• 6 cups Rice Krispies cereal
• 1 cup Semi-sweet chocolate chips
• 0.5 cup Chopped roasted peanuts
• 0.25 teaspoons Flaky sea salt (optional, for topping)

Directions

Step 1

Preheat your oven to 350°F (175°C) and line a 9x13-inch baking pan with parchment paper, leaving an overhang for easy removal later.

Step 2

In a large pot over medium heat, melt the butter. Once melted, stir in 8 cups of mini marshmallows and cook, stirring constantly, until the marshmallows are fully melted and smooth.

Step 3

Reduce the heat to low and stir in the peanut butter, vanilla extract, and salt until well combined.

Step 4

Remove the pot from the heat and quickly fold in the Rice Krispies cereal until evenly coated in the marshmallow-peanut butter mixture. Stir in the remaining 2 cups of mini marshmallows for added texture.

Step 5

Press the mixture evenly into the prepared pan, using a greased spatula or the back of a spoon to ensure an even layer. Be careful not to press too hard; this will keep the bars light and chewy.

Step 6

Sprinkle the chocolate chips and chopped peanuts evenly over the top of the mixture, gently pressing them into the surface.

Step 7

Bake the pan in the preheated oven for 8-10 minutes, just until the chocolate chips melt slightly and the top is lightly golden.

Step 8

Remove from the oven and sprinkle with flaky sea salt, if desired. Allow the bars to cool completely in the pan, about 1 hour at room temperature or 20 minutes in the refrigerator.

Step 9

Once cooled and set, use the parchment overhang to lift the bars out of the pan and onto a cutting board. Slice into 12 equal squares or rectangles.

Step 10

Serve and enjoy! Store any leftovers in an airtight container at room temperature for up to 3 days.

Nutrition Facts

Serving size	(1280.3g)

Amount per serving	% Daily Value*
Calories	5622.0

Total Fat 274.0g	0%
Saturated Fat 98.0g	0%
Polyunsaturated Fat g
Cholesterol 186mg	0%
Sodium 4068.4mg	0%
Total Carbohydrate 763.5g	0%
Dietary Fiber 34.0g	0%
Total Sugars 452.1g
Protein 100.0g	0%

Vitamin D 479.5IU	0%
Calcium 216.7mg	0%
Iron 49.0mg	0%
Potassium 2204.7mg	0%

*The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.

Source of Calories

Fat: 41.7%

Protein: 6.8%

Carbs: 51.6%