🎉 Introduction
If you’ve ever had the legendary Costco Marshmallow Crispy Cookies, you already know — they’re soft, chewy, gooey, and crispy all at once! These Marshmallow Crispy Cookies are the perfect homemade version of that iconic treat.
They combine a buttery brown-sugar base with chewy bits of marshmallow and the irresistible crunch of rice krispie cereal. Every bite is a harmony of textures — crispy, tender, and slightly gooey in the center.
Whether you’re making them for a bake sale, an after-school snack, or just because you miss the Costco version, this recipe gives you that same bakery-quality taste right from your own oven.
🧰 Equipment Needed
You’ll only need simple baking tools:
- Mixing bowls (large and medium)
- Hand or stand mixer
- Measuring cups and spoons
- Rubber spatula
- Baking sheet
- Parchment paper or silicone baking mat
- Cooling rack
🛒 Ingredients
Fresh Products
- 1 Large egg
Breakfast Ingredients
- 1 1/2 cups Rice Krispie cereal
Dry & Flavoring Ingredients
- 1 cup All-purpose flour
- 1/2 tsp Baking soda
- 3/4 cup Brown sugar (packed)
- 1/2 cup Granulated sugar
- 3/4 tsp Salt
- Flaked sea salt, for topping
- 1 tsp Vanilla extract
Dairy
- 1/2 cup Salted butter, softened
Desserts
- 2/3 cup Mini marshmallows
👩🍳 Directions
step1:
Preheat your oven to 350°F (175°C). Line a baking sheet with parchment paper or a silicone mat.
step2:
In a medium bowl, whisk together the flour, baking soda, and salt. Set aside.
step3:
In a large mixing bowl, cream together the butter, brown sugar, and granulated sugar until light and fluffy — about 2 minutes.
step4:
Add the egg and vanilla extract. Beat until well combined and creamy.
step5:
Gradually add the dry ingredients into the wet mixture, stirring just until a soft dough forms.
step6:
Gently fold in the Rice Krispie cereal and mini marshmallows until evenly distributed. Be careful not to crush the cereal.
step7:
Scoop the dough into 1½-inch balls and place them on the prepared baking sheet, leaving space between each cookie.
step8:
Lightly press the tops to flatten them slightly. Sprinkle a few flakes of sea salt on top for that perfect sweet-salty contrast.
step9:
Bake for 10–12 minutes, or until the edges are golden but the centers are still soft and gooey.
step10:
Let cookies cool on the tray for 5 minutes before transferring to a cooling rack. Serve warm or once fully cooled for a chewy texture.
🍽️ Servings & Timing
- Makes: About 20 cookies
- Prep time: 10 minutes
- Bake time: 12 minutes
- Total time: ~25 minutes
🧊 Storage & Reheating
- Store cookies in an airtight container at room temperature for up to 4 days.
- To keep them soft, add a slice of bread to the container.
- Freeze baked cookies for up to 2 months.
- Reheat in the microwave for 8–10 seconds to enjoy them warm and gooey again.
🥄 Variations
- Chocolate Drizzle: Add a drizzle of melted milk or dark chocolate after cooling.
- Peanut Butter Twist: Stir 2 tbsp peanut butter into the dough for a richer flavor.
- S’mores Style: Add a few mini chocolate chips for that classic campfire taste.
- Cereal Swap: Try Cornflakes or Fruity Pebbles instead of Rice Krispies for fun textures.
- Holiday Version: Add red and green sprinkles to make them festive for Christmas.
❓ 10 FAQs
1. Why use Rice Krispies in cookies?
They add the signature crunch and light texture that make these cookies unique.
2. Can I use unsalted butter?
Yes, but add an extra 1/4 tsp of salt to the dough.
3. How do I stop marshmallows from melting too much?
Chill the dough for 10 minutes before baking — it helps them hold shape better.
4. Can I use large marshmallows?
Cut them into small pieces or use minis for even distribution.
5. Do these cookies spread?
Slightly — to control spreading, don’t over-cream the butter and sugar.
6. Can I make them gluten-free?
Yes, use a 1:1 gluten-free flour blend and gluten-free crispy rice cereal.
7. Can I add chocolate chips?
Absolutely — a handful of semi-sweet chips adds extra indulgence.
8. How do I make them chewier?
Add 1 extra tbsp of brown sugar and bake just until edges are set.
9. Why top with sea salt?
The flakes enhance flavor contrast and make every bite pop.
10. How do I keep them from getting too hard?
Do not overbake — remove when centers still look soft.
🏁 Conclusion
These Marshmallow Crispy Cookies (Costco Copycat) are the perfect mix of crunchy cereal, gooey marshmallows, and buttery cookie dough. Every bite delivers that cozy, nostalgic flavor with the satisfying chew and crisp edge you remember from Costco’s bakery.
They’re easy to make, fun to customize, and guaranteed to disappear fast — a family-favorite cookie you’ll bake again and again.
Marshmallow Crispy Cookies (Costco Copycat) – Chewy, Gooey & Perfectly Crunchy
Ingredients
✨ Kitchen Essentials You’ll Love
Quick picks I trust for better results, faster prep, and easier cleanup.
-
🍳View ↗
Lodge Seasoned Cast Iron Skillet
-
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Instant Pot Duo Plus 9-in-1 Electric
-
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CHEFMAN Digital Air Fryer XL 10L
Disclosure: As an Amazon Associate, I earn from qualifying purchases at no extra cost to you.
Equipment
Method
- Preheat your oven to 350°F (175°C). Line a baking sheet with parchment paper or a silicone mat.
- In a medium bowl, whisk together the flour, baking soda, and salt. Set aside.
- In a large mixing bowl, cream together the butter, brown sugar, and granulated sugar until light and fluffy — about 2 minutes.
- Add the egg and vanilla extract. Beat until well combined and creamy.
- Gradually add the dry ingredients into the wet mixture, stirring just until a soft dough forms.
- Gently fold in the Rice Krispie cereal and mini marshmallows until evenly distributed. Be careful not to crush the cereal.
- Scoop the dough into 1½-inch balls and place them on the prepared baking sheet, leaving space between each cookie.
- Lightly press the tops to flatten them slightly. Sprinkle a few flakes of sea salt on top for that perfect sweet-salty contrast.
- Bake for 10–12 minutes, or until the edges are golden but the centers are still soft and gooey.
- Let cookies cool on the tray for 5 minutes before transferring to a cooling rack. Serve warm or once fully cooled for a chewy texture.
Notes
They add the signature crunch and light texture that make these cookies unique. 2. Can I use unsalted butter?
Yes, but add an extra 1/4 tsp of salt to the dough. 3. How do I stop marshmallows from melting too much?
Chill the dough for 10 minutes before baking — it helps them hold shape better. 4. Can I use large marshmallows?
Cut them into small pieces or use minis for even distribution. 5. Do these cookies spread?
Slightly — to control spreading, don’t over-cream the butter and sugar. 6. Can I make them gluten-free?
Yes, use a 1:1 gluten-free flour blend and gluten-free crispy rice cereal. 7. Can I add chocolate chips?
Absolutely — a handful of semi-sweet chips adds extra indulgence. 8. How do I make them chewier?
Add 1 extra tbsp of brown sugar and bake just until edges are set. 9. Why top with sea salt?
The flakes enhance flavor contrast and make every bite pop. 10. How do I keep them from getting too hard?
Do not overbake — remove when centers still look soft. 🏁 Conclusion These Marshmallow Crispy Cookies (Costco Copycat) are the perfect mix of crunchy cereal, gooey marshmallows, and buttery cookie dough. Every bite delivers that cozy, nostalgic flavor with the satisfying chew and crisp edge you remember from Costco’s bakery. They’re easy to make, fun to customize, and guaranteed to disappear fast — a family-favorite cookie you’ll bake again and again.
