Monster Cookies

Big, bold, and bursting with color, Monster Cookies are the ultimate kitchen sink treat. Packed with oats, peanut butter, chocolate chips, and candy-coated chocolate pieces, each bite delivers a chewy, satisfying mix of textures and flavors. Whether you’re baking for a crowd, a party, or just to treat yourself, these oversized cookies never fail to impress.

Behind the Recipe

This recipe brings back memories of lazy weekend baking marathons, when the goal was simply to empty out the pantry and see what magic could come from it. Monster Cookies were my go-to as a kid because they welcomed everything—peanut butter, oats, chocolate, and candy—with open arms. No strict rules, just heaps of goodness packed into one irresistible cookie. Over the years, it became my signature “clean out the cupboard” recipe, and honestly, it still holds up.

Recipe Origin or Trivia

Monster Cookies have been a part of American baking culture for decades. Believed to have originated in the Midwest, these cookies gained popularity in the 1970s as a deliciously chaotic mashup of oatmeal cookies and peanut butter chocolate chip cookies. They earned the “monster” name not just for their size, but for their all-in, no-limits ingredient list that often feels like a deliciously sweet monster mash.

Why You’ll Love Monster Cookies

Monster Cookies are like a party in every bite—and they bring more than just fun to the table. Here’s what makes them extra special:

Versatile: Throw in your favorite add-ins or switch up the candies depending on the season.
Budget-Friendly: Uses pantry staples and common baking ingredients.
Quick and Easy: No chilling required, just mix and bake.
Customizable: Gluten-free oats? Dark chocolate? Go for it.
Crowd-Pleasing: Kids and adults alike can’t resist their chewy, colorful charm.
Make-Ahead Friendly: Dough freezes beautifully for fresh cookies on demand.
Great for Leftovers: Crumble them into ice cream or blend into milkshakes.

Chef’s Pro Tips for Perfect Results

Let’s make sure your cookies come out thick, chewy, and bursting with flavor:

  • Don’t overmix the dough—just stir until combined to avoid tough cookies.
  • Use room temperature butter and eggs for even mixing.
  • Slightly underbake for gooey centers and perfect texture once cooled.
  • Press extra candy pieces on top before baking for that bakery-style finish.
  • Let cookies cool on the baking sheet for 5 minutes before transferring.

Kitchen Tools You’ll Need

Keep your setup simple but smart for the best cookie experience:

Mixing Bowls: One for wet ingredients, one for dry.
Hand Mixer or Stand Mixer: Makes blending peanut butter and butter a breeze.
Cookie Scoop: For evenly sized, bakery-style cookies.
Baking Sheets: Lined with parchment paper for easy removal and cleanup.
Cooling Rack: Helps cookies set properly without overbaking.

Ingredients in Monster Cookies

This fun and flexible ingredient list is what makes Monster Cookies so addictive:

  1. Rolled Oats: 2 cups – Adds chew and heartiness to every bite.
  2. Peanut Butter: 1 cup – Brings rich, nutty flavor and soft, dense texture.
  3. Brown Sugar: 1 cup – Adds moisture and deep caramel notes.
  4. Granulated Sugar: ¾ cup – Provides that crisp edge and balanced sweetness.
  5. Butter: ½ cup (softened) – Creamy base for flavor and structure.
  6. Eggs: 2 large – Helps bind the ingredients and adds richness.
  7. Vanilla Extract: 1 teaspoon – Boosts the flavor profile.
  8. Baking Soda: 1 teaspoon – Gives a gentle lift to keep cookies from being too dense.
  9. Chocolate Chips: 1 cup – Melty pockets of classic chocolatey goodness.
  10. Candy-Coated Chocolate Pieces: 1 cup – Adds color, crunch, and a little fun.

Ingredient Substitutions

Need to make a quick switch? Here are some handy swaps:

Peanut Butter: Try almond or sunflower seed butter for an allergy-friendly version.
Brown Sugar: Use coconut sugar or more white sugar with a dash of molasses.
Butter: Substitute with margarine or coconut oil if needed.
Rolled Oats: Quick oats can work in a pinch, though the texture will change.
Chocolate Chips: Chopped chocolate bars or white chocolate chips work too.

Ingredient Spotlight

Peanut Butter: The rich, creamy star of the cookie that brings moisture and that crave-worthy nutty taste.

Rolled Oats: These give the cookies their signature chewy texture and make them feel hearty and satisfying.

Instructions for Making Monster Cookies

These cookies come together fast and with minimal fuss, which is exactly what you want in a go-to bake. Here’s how to make them:

  1. Preheat Your Equipment:
    Preheat your oven to 350°F and line your baking sheets with parchment paper.
  2. Combine Ingredients:
    In one bowl, cream together the butter, peanut butter, brown sugar, and granulated sugar until fluffy. Beat in eggs and vanilla until smooth.
  3. Prepare Your Cooking Vessel:
    In a separate bowl, mix together oats and baking soda. Add this dry mixture to the wet ingredients and stir until combined.
  4. Assemble the Dish:
    Fold in chocolate chips and candy-coated pieces. Use a cookie scoop to portion dough onto prepared baking sheets, spacing them out generously.
  5. Cook to Perfection:
    Bake for 10 to 12 minutes, or until edges are set and centers look slightly underbaked.
  6. Finishing Touches:
    Press extra candies on top right out of the oven for that fresh-baked wow factor. Let cool on the tray for 5 minutes before moving to a rack.
  7. Serve and Enjoy:
    Enjoy warm with a cold glass of milk or let cool completely for chewy, bakery-style cookies.

Texture & Flavor Secrets

These cookies strike the perfect balance between soft and chewy, thanks to the oats and peanut butter combo. You’ll get bits of melty chocolate, crisp edges, and little pops of candy crunch in every bite. The brown sugar adds depth, while the vanilla rounds out the richness.

Cooking Tips & Tricks

Keep these in mind for extra cookie success:

  • Use a large cookie scoop for that classic oversized monster cookie look.
  • Refrigerate dough for 30 minutes if it’s too sticky to handle.
  • Add a pinch of sea salt on top for a flavor boost.

What to Avoid

Even monster cookies have their limits! Avoid these missteps:

  • Don’t overbake—they’ll set as they cool.
  • Avoid natural peanut butters with oil separation for best texture.
  • Don’t skip the parchment paper, or you’ll struggle with sticking.

Nutrition Facts

Servings: 18 large cookies
Calories per serving: 280

Note: These are approximate values.

Preparation Time

Prep Time: 15 minutes
Cook Time: 12 minutes
Total Time: 27 minutes

Make-Ahead and Storage Tips

Make the dough ahead and store it in the fridge for up to 3 days or freeze pre-scooped balls for fresh cookies anytime. Baked cookies stay soft in an airtight container for up to 5 days, or you can freeze them for up to 2 months—just thaw and enjoy.

How to Serve Monster Cookies

Serve them fresh out of the oven with a cold glass of milk or a warm mug of coffee. Stack them on a cookie tray or wrap individually for party favors. They also make great additions to lunchboxes or care packages.

Creative Leftover Transformations

Got extras? Get creative:

  • Ice Cream Sandwiches: Sandwich a scoop of vanilla between two cookies.
  • Cookie Milkshakes: Blend into vanilla ice cream with milk for a decadent shake.
  • Crumbled Dessert Topping: Use as a topping for yogurt or brownies.

Additional Tips

  • Use colorful seasonal candies to match holidays.
  • Add chopped nuts for extra crunch and richness.
  • Let kids press in the candy pieces for a fun hands-on moment.

Make It a Showstopper

Display the cookies on a rustic wood board with a glass of milk, and sprinkle a few extra candies around the plate. For parties, tie stacks of cookies with twine and set them in mason jars or gift bags.

Variations to Try

  • S’mores Style: Add mini marshmallows and crushed graham crackers.
  • Trail Mix Twist: Mix in raisins, sunflower seeds, and chopped nuts.
  • Double Chocolate: Use chocolate dough for a richer base.
  • Fruit Burst: Add dried cranberries or cherries for a tangy bite.
  • Espresso Hit: Add a teaspoon of instant espresso powder to enhance the chocolate.

FAQ’s

Q1: Can I make these gluten-free?
Yes, just use certified gluten-free oats and check your candy labels.

Q2: Can I make them smaller?
Absolutely. Just reduce baking time to 8–10 minutes.

Q3: What kind of peanut butter works best?
Creamy, non-natural peanut butter yields the best texture.

Q4: Can I freeze the dough?
Yes, scoop onto a tray, freeze, then transfer to a bag for long-term storage.

Q5: Why are my cookies spreading too much?
Your butter may be too soft or warm. Try chilling the dough before baking.

Q6: Do I need to chill the dough?
Not required, but 30 minutes of chilling can help reduce spread.

Q7: Can I use natural peanut butter?
It’s best to avoid it due to oil separation, but a no-stir natural brand can work in a pinch.

Q8: Can I skip the candy pieces?
Sure, replace with more chocolate chips or another favorite mix-in.

Q9: How do I keep them soft?
Store with a slice of bread in the container to maintain moisture.

Q10: Can kids help make these?
Yes! They’ll love mixing and pressing the candies into the dough.

Conclusion

Monster Cookies are everything you want in a dessert—easy, colorful, chewy, and full of character. Whether you’re baking for a party or just looking for a feel-good kitchen moment, these cookies are always a hit. Trust me, once you try them, you’ll keep coming back for more.

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Monster Cookies

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  • Author: Emily

Description

Monster Cookies are the ultimate chewy, colorful treat packed with oats, peanut butter, chocolate chips, and candy-coated pieces. Easy to make and impossible to resist.


Ingredients

Scale
  • 2 cups rolled oats
  • 1 cup peanut butter
  • 1 cup brown sugar
  • 3/4 cup granulated sugar
  • 1/2 cup butter, softened
  • 2 large eggs
  • 1 teaspoon vanilla extract
  • 1 teaspoon baking soda
  • 1 cup chocolate chips
  • 1 cup candy-coated chocolate pieces


Instructions

  1. Preheat oven to 350°F and line baking sheets with parchment paper.
  2. Cream together the butter, peanut butter, brown sugar, and granulated sugar until fluffy.
  3. Beat in eggs and vanilla until smooth.
  4. In a separate bowl, mix oats and baking soda, then combine with the wet mixture.
  5. Fold in chocolate chips and candy-coated pieces.
  6. Scoop dough onto prepared sheets, spacing them out.
  7. Bake for 10–12 minutes, until edges are set but centers are soft.
  8. Cool on the sheet for 5 minutes, then transfer to a wire rack.

Notes

  • Use a cookie scoop for uniform size and even baking.
  • Press extra candy pieces on top for a bakery-style look.
  • Store with a slice of bread to keep cookies soft.

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