If you’re looking for a quick, no-bake dessert that’s crunchy, chewy, and irresistibly sweet, these Marshmallow Peanut Butter Cornflake Cookies are exactly what you need. Made with simple pantry ingredients, they combine creamy peanut butter, gooey marshmallows, and crispy cornflakes into the perfect bite.
Why You’ll Love These Cookies
- No baking required – perfect for beginners
- Ready in under 20 minutes
- Only 5–6 simple ingredients
- Perfect balance of crunchy + chewy texture
- Great for parties, snacks, or quick desserts
Ingredients
- ½ cup unsalted butter
- ¾–1 cup creamy peanut butter
- 3 cups mini marshmallows (plus extra for texture)
- ½ cup granulated sugar (optional depending on sweetness)
- 1 teaspoon vanilla extract
- 5–7 cups cornflake cereal
How to Make Marshmallow Peanut Butter Cornflake Cookies
Step 1: Melt the base
In a large saucepan over medium-low heat:
- Melt the butter
- Add peanut butter and stir until smooth
- Add marshmallows and stir continuously until fully melted
👉 The mixture should be smooth and creamy—avoid overheating to prevent burning.
Step 2: Add flavor
Remove from heat and mix in:
- Vanilla extract
- A pinch of salt (optional)
This enhances the sweetness and balances flavors.
Step 3: Fold in cornflakes
- Add cornflakes gradually
- Gently fold until fully coated
Be careful not to crush the cereal—you want to keep that crunchy texture.
Step 4: Shape the cookies
- Drop spoonfuls onto parchment paper
- Shape into small mounds
Work quickly before the mixture sets.
Step 5: Let them set
- Allow cookies to cool at room temperature (or refrigerate 30 minutes)
- Once firm, they’re ready to enjoy
Pro Tips for Perfect Cookies
- ✅ Use creamy peanut butter for best texture
- ✅ Don’t overheat marshmallows (they can become hard)
- ✅ Add extra mini marshmallows at the end for gooey bites
- ✅ Lightly grease your spoon to prevent sticking
Variations You Can Try
1. Chocolate Version
Add:
- ½ cup chocolate chips
- Drizzle melted chocolate on top
2. Crunchy Deluxe
- Add chopped peanuts
- Use crunchy peanut butter
3. Healthier Twist
- Use natural peanut butter
- Replace sugar with honey
Storage Tips
- Store in an airtight container at room temperature for up to 3 days
- Refrigerate for up to 1 week
- Avoid humidity (it softens the cornflakes)
Nutrition (Approximate per cookie)
- Calories: 110–150 kcal
- Carbs: Moderate
- Fat: From peanut butter
- Protein: Small boost from peanuts
Frequently Asked Questions
Can I make these without marshmallows?
Yes, you can use corn syrup instead, but marshmallows give a softer, chewier texture.
Why are my cookies too hard?
You likely overheated the sugar or marshmallow mixture.
Can I freeze these cookies?
Yes! Freeze for up to 2 months in an airtight container.
Can I use other cereals?
Absolutely—try:
- Rice Krispies
- Cheerios
- Frosted flakes (for extra sweetness)
Final Thoughts
These Marshmallow Peanut Butter Cornflake Cookies are one of the easiest desserts you’ll ever make. With their perfect mix of crunchy cornflakes and gooey marshmallow peanut butter coating, they’re guaranteed to become a favorite in your kitchen.
Whether you’re making them for a quick snack, a party, or your food blog, this recipe is simple, viral-worthy, and highly addictive.