Total Time: 15 minutes (plus 30 minutes cooling)
Active Time: 10 minutes
Intensity: Very Easy (Beginner-Friendly)
Yield: 12 large squares or 24 small bars
The Last Word on Rice Krispie Treats
Before you begin, know this: the recipe below is the definitive version. Born in 1939 in the Kellogg’s Home Economics Department, it’s a masterpiece of minimalist cooking where three humble ingredients unite to create something timeless. The magic lies not in complexity, but in technique—perfectly melted marshmallows coated in butter create the signature crispy-yet-chewy texture that defines a childhood, comforts an adult, and turns any day into a celebration. This is the gold standard. Master it once, and you’ll have a lifelong, foolproof recipe for joy.
Ingredients
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6 cups (170g) Rice Krispies® cereal (or generic crisp rice cereal)
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4 tablespoons (½ stick / 57g) unsalted butter, plus extra for greasing
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1 package (10 oz / 283g) regular marshmallows (about 40 marshmallows)
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¼ teaspoon fine sea salt (optional but recommended)
Equipment:
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13×9-inch baking pan
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Large saucepan (at least 3-quart capacity)
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Heat-resistant silicone spatula or wooden spoon
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Butter knife or offset spatula
Step-by-Step Instructions
1. Prepare the Stage (2 minutes)
Generously grease the entire interior of your 13×9-inch baking pan with butter. This is non-negotiable for easy release. Set it aside. Measure out your cereal into a large, heat-safe bowl. Having everything ready before you start cooking is crucial—the process moves quickly.
2. Melt & Combine (7 minutes)
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In your large saucepan, melt the 4 tablespoons of butter over low heat. Swirl the pan occasionally until the butter is fully melted and just beginning to foam. Do not let it brown.
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The Critical Step: Add the entire bag of marshmallows and the optional salt to the melted butter. Continue cooking over low heat, stirring constantly with your spatula. The marshmallows will slowly deflate and melt into a smooth, sticky, lava-like consistency. This should take about 5-7 minutes. Patience is key: rushing this step with higher heat will scorch the marshmallows and create a hard, brittle treat.
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Once the marshmallow mixture is completely smooth with no visible lumps, immediately remove the saucepan from the heat.
3. The Grand Mix (1 minute)
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Immediately pour the measured Rice Krispies cereal into the saucepan with the hot marshmallow mixture.
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Working quickly, fold and stir until every single cereal piece is thoroughly and evenly coated in the glossy marshmallow syrup. The mixture will be very sticky and thick.
4. Press & Set (5 minutes active + 30 minutes passive)
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Immediately transfer the hot mixture into your prepared pan.
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The Pro-Techique: To get perfectly even, non-sticky bars, lightly butter your hands, a sheet of parchment paper, or the bottom of a flat measuring cup. Gently but firmly press the mixture into an even layer, working it into all the corners. Do not compact it with excessive force, as this will make the treats dense and hard. You want a light, airy compression.
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Allow the pan to cool completely at room temperature for at least 30 minutes. Do not attempt to cut while warm, as they will not hold their shape.
5. Slice & Serve (2 minutes)
Run a butter knife along the edges of the pan. Invert the entire slab onto a cutting board (you may need to gently tap the bottom). Cut into 12 large squares or 24 smaller rectangular bars using a sharp knife in a clean, decisive motion.
Nutrition Information (per serving, based on 12 large squares)
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Calories: ~210 kcal
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Total Fat: 6g
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Saturated Fat: 3.5g
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Cholesterol: 15mg
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Sodium: 180mg
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Total Carbohydrates: 40g
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Dietary Fiber: 0g
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Sugars: 24g
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Protein: 1g