Peanut Butter Cup Surprise Monster Cookies

Thick monster cookies packed with mix-ins and a melty peanut butter cup surprise inside.

Peanut Butter Cup Surprise Monster Cookies

⭐️⭐️⭐️⭐️⭐️ (4.8 from 2,500 fans)

📸 1100+ photo shares | ☀️ Updated December 2025

Get ready to meet your new favorite cookie obsession! These aren’t just any monster cookies; they’re the Peanut Butter Cup Monster Cookies that hide a delightful secret within. Imagine a perfectly chewy, oat-filled cookie loaded with chocolate chips and M&M’s, then BAM! — a molten, melty Reese’s Peanut Butter Cups center bursts forth with every bite. It’s a flavor explosion, a texture wonderland, and an absolute joy to bake and share. If you love a surprise and can’t get enough of that classic peanut butter and chocolate combo, these cookies are calling your name!

Why You’ll Love This Recipe

These cookies are pure happiness in every bite. Here’s why they’ll become a staple in your baking rotation:

The Ultimate Surprise: That hidden peanut butter cup is a game-changer, elevating a classic monster cookie to legendary status.
Easy & Fun: Despite their impressive nature, they’re surprisingly simple to make, perfect for bakers of all levels.
Crowd-Pleaser: Loaded with everyone’s favorite mix-ins, these cookies disappear fast at parties, potlucks, and family gatherings.
Texture Heaven: A perfect blend of chewy oats, crunchy M&M’s, gooey chocolate chips, and that smooth, melty peanut butter cup.
Nostalgic Flavors: They bring together the best of childhood treats into one glorious cookie.

What You’ll Need

This recipe yields about 24 glorious cookies and takes approximately 25 minutes of prep time.

1 cup (2 sticks) unsalted butter, softened
1 cup granulated sugar
1 cup packed light brown sugar
2 large eggs
1 teaspoon vanilla extract
1 ½ cups creamy peanut butter
2 ¼ cups all-purpose flour
1 teaspoon baking soda
½ teaspoon salt
3 cups old-fashioned rolled oats
1 cup semi-sweet chocolate chips
1 cup M&M’s candies
24 mini Reese’s Peanut Butter Cups, unwrapped

How to Make Peanut Butter Cup Surprise Monster Cookies

 

Let’s get baking! Follow these simple steps to create your own batch of incredible Peanut Butter Cup Monster Cookies.

1. Preheat & Prep: Preheat your oven to 350°F (175°C). Line two baking sheets with parchment paper.
2. Cream Butter & Sugars: In a large mixing bowl, cream together the softened butter, granulated sugar, and brown sugar until light and fluffy (about 2-3 minutes).
3. Add Wet Ingredients: Beat in the eggs one at a time, then stir in the vanilla extract and creamy peanut butter until well combined.
4. Combine Dry Ingredients: In a separate medium bowl, whisk together the flour, baking soda, and salt.
5. Mix Wet & Dry: Gradually add the dry ingredients to the wet ingredients, mixing on low speed until just combined. Do not overmix.
6. Fold in Goodies: Stir in the old-fashioned oats, chocolate chips, and M&M’s until evenly distributed throughout the dough.
7. Form & Stuff: Take about 2 tablespoons of cookie dough and flatten it into a disc. Place one unwrapped mini Reese’s Peanut Butter Cups in the center. Carefully wrap the dough around the peanut butter cup, sealing it completely to form a ball.
8. Bake: Place the stuffed cookie dough balls about 2 inches apart on the prepared baking sheets.
9. Bake to Perfection: Bake for 10-12 minutes, or until the edges are golden brown and the centers are just set. The cookies will still look a little soft in the middle—that’s perfect!
10. Cool: Let the cookies cool on the baking sheets for 5 minutes before transferring them to a wire rack to cool completely. This helps them set up and prevents them from breaking.

Fun Twists & Serving Ideas

These cookies are already a party, but here are some ideas to make them even more special:

Candy Swap: Instead of Reese’s, try stuffing with mini Snickers, caramel squares, or even a different type of chocolate truffle for a varied surprise.
Nutty Addition: Fold in ½ cup of chopped peanuts or pecans into the dough for extra crunch.
Sea Salt Finish: A sprinkle of flaky sea salt on top of the warm cookies really enhances the chocolate and peanut butter flavors.
Ice Cream Sandwich: Once cooled, sandwich a scoop of vanilla or chocolate ice cream between two cookies for an epic dessert.
Drizzle Delight: Drizzle cooled cookies with melted chocolate or peanut butter for an extra layer of decadence.
Seasonal Colors: Swap M&M’s for seasonal colors to fit any holiday or occasion!

User Reviews

Curious what others think? Here’s what our fans are saying:

Jessica L. ⭐️⭐️⭐️⭐️⭐️
“These cookies are phenomenal! The surprise Reese’s cup inside is pure genius. My kids declared them the best cookies I’ve ever made, and honestly, I agree. So easy to follow and the results are incredibly satisfying!”

Mark T. ⭐️⭐️⭐️⭐️⭐️
“I brought these to a potluck and they were the first thing to disappear! Everyone was asking for the recipe. The oats give them a great texture, and that gooey peanut butter cup center is just divine. Highly recommend!”

Sarah P. ⭐️⭐️⭐️⭐️⭐️
“Oh my goodness, where have these cookies been all my life?! The instructions were clear, and the cookies turned out perfectly. I love the combination of sweet and salty, and the hidden treat is such a fun touch. Will definitely be making these again!”

FAQs

Got questions? We’ve got answers!

Q: Can I use crunchy peanut butter?
A: While creamy peanut butter gives the best texture to the dough, you can use crunchy peanut butter if you prefer. Just be aware it will add more texture to the cookie itself.

Q: How do I store these cookies?
A: Store leftover cookies in an airtight container at room temperature for up to 3-4 days, or in the refrigerator for up to a week. They also freeze beautifully for up to 3 months!

Q: Can I make the dough ahead of time?
A: Yes! You can prepare the dough, stuff the peanut butter cups, and then refrigerate the cookie dough balls for up to 2-3 days before baking. You may need to add a minute or two to the baking time if baking from cold.

Q: What if I don’t have mini Reese’s Peanut Butter Cups?
A: You can use regular-sized peanut butter cups cut into quarters, or any other small chocolate candy that melts well. The surprise element is key!

There you have it – the secret to the most exciting cookie you’ll ever bake! These Peanut Butter Cup Monster Cookies are more than just a treat; they’re an experience. That hidden Reese’s Peanut Butter Cups surprise takes them from great to absolutely unforgettable. So roll up your sleeves, gather your ingredients, and get ready to spread some serious joy with every single bite of these incredible Peanut Butter Cup Monster Cookies. Happy baking!

Recipe Note: Baking times can vary based on your oven. Always keep an eye on your cookies for the perfect golden-brown edges!