Monster Fudge Bars
When it comes to decadent treats that can make any gathering feel special, Monster Fudge Bars take the cake—or rather, the fudge! These bars are an explosion of flavors and textures, combining gooey chocolate, crunchy peanut butter, and a delightful hint of sweetness from mini M&M’s. Perfect for parties, potlucks, or just a cozy night in, these bars will quickly become a favorite in your dessert repertoire. Let’s dive into this delicious recipe that is as satisfying to make as it is to eat!
Why You’ll Keep Making It
Monster Fudge Bars are not just any dessert; they are a celebration of flavors! The combination of chocolate chip cookie dough, oats, and candy creates a rich, chewy texture that is impossible to resist. Here are a few reasons why you’ll want to keep this recipe in your back pocket:
- Easy to Make: With simple ingredients and straightforward steps, these bars are perfect for bakers of all levels.
- Customizable: Feel free to swap out the candies or add your favorite nuts for a personal touch.
- Shareable: These bars are great for sharing, making them ideal for gatherings and events.
- Deliciously Indulgent: Each bite offers a burst of flavor, from the creamy chocolate to the crunchy peanut butter.
Ingredient Rundown
Let’s take a closer look at the ingredients you will be using. Each one plays an important role in creating the perfect Monster Fudge Bars:
- 2 cups refrigerated chocolate chip cookie dough: This serves as the base of your bars, providing a rich and chewy texture.
- 1/2 cup old fashioned or quick oats: Oats add a wholesome touch and a bit of chewiness to the bars.
- 1 cup mini M&M’s: These colorful candies not only look great but also add a fun crunch and sweetness.
- 1 cup Reese’s peanut butter chips: The creamy peanut butter flavor is a perfect match for chocolate and enhances the overall indulgence.
- 14 oz sweetened condensed milk: This acts as a binding agent, creating a fudgy texture that holds everything together.
- 12 oz semisweet chocolate chips: Rich and chocolatey, these chips will melt beautifully for the top layer.
- 1 tsp vanilla extract: A splash of vanilla amplifies the flavors and adds depth to the bars.
Tools & Equipment Needed
Before diving into the kitchen, gather the necessary tools to ensure a smooth baking experience:
- 9×13 inch baking pan: Ideal for spreading out the mixture evenly.
- Parchment paper: Helps in easy removal of the bars from the pan.
- Mixing bowls: For combining the ingredients.
- Spatula: Perfect for spreading the cookie dough and chocolate layers.
- Oven: Essential for baking the bars to perfection.
Stepwise Method: Monster Fudge Bars

Now that you’re equipped with the ingredients and tools, let’s get started on making these irresistible Monster Fudge Bars!
Step 1: Preheat the Oven
Preheat your oven to 350°F (175°C). This ensures that your Monster Fudge Bars bake evenly and come out perfectly gooey.
Step 2: Prepare the Baking Pan
Line your 9×13 inch baking pan with parchment paper, leaving some overhang on the sides. This will make it easier to lift the bars out once they are cool.
Step 3: Spread the Cookie Dough
In a mixing bowl, take the 2 cups of refrigerated chocolate chip cookie dough and spread it evenly across the bottom of the prepared pan. Use your fingers or a spatula to press it down firmly.
Step 4: Add the Oats and M&M’s
In a separate bowl, combine the oats and 1 cup of mini M&M’s. Sprinkle this mixture over the cookie dough layer, distributing it evenly.
Step 5: Melt the Peanut Butter Chips
In a microwave-safe bowl, combine the 1 cup of Reese’s peanut butter chips with the 14 oz of sweetened condensed milk. Microwave in 30-second intervals, stirring in between, until smooth and well combined.
Step 6: Pour the Peanut Butter Mixture
Pour the melted peanut butter mixture over the oats and M&M’s layer, spreading it out evenly with a spatula.
Step 7: Add the Chocolate Chips
Sprinkle the 12 oz of semisweet chocolate chips over the peanut butter layer, ensuring they are evenly distributed.
Step 8: Bake the Bars
Place the pan in the preheated oven and bake for 25-30 minutes, or until the edges are golden brown and the center is set. Be careful not to overbake!
Step 9: Cool and Chill
Once baked, remove the pan from the oven and let it cool at room temperature for about 30 minutes. Then, refrigerate for at least 2 hours to allow the bars to set completely.
Step 10: Slice and Serve
Once chilled, lift the bars out of the pan using the parchment paper overhang. Cut them into squares or rectangles and serve!
Spring–Summer–Fall–Winter Ideas

No matter the season, Monster Fudge Bars can be enjoyed all year round. Here are some ideas to make these bars fit any occasion:
- Spring: Add pastel-colored M&M’s for an Easter-themed treat.
- Summer: Serve them at backyard barbecues or picnics for a fun dessert.
- Fall: Incorporate pumpkin spice into the cookie dough for a seasonal twist.
- Winter: Top with crushed peppermint candies for a festive flair during the holidays.
If You’re Curious
Monster Fudge Bars are versatile and can be customized to suit your taste. Here are some fun variations and substitutions you might consider:
- Try using butterscotch chips or white chocolate chips instead of peanut butter chips for a different flavor profile.
- Add chopped nuts, such as walnuts or pecans, for added crunch.
- Replace the M&M’s with chocolate-covered pretzels for a sweet and salty combination.
- Drizzle melted chocolate over the top for an extra touch of indulgence.
Shelf Life & Storage
To keep your Monster Fudge Bars fresh and delicious, follow these storage tips:
- Store in an airtight container at room temperature for up to 5 days.
- For longer storage, keep them in the refrigerator for up to 2 weeks.
- These bars can also be frozen! Wrap them tightly in plastic wrap and foil for up to 3 months. Thaw in the refrigerator before serving.
Frequently Asked Questions
Can I use homemade cookie dough instead of refrigerated dough?
Absolutely! Homemade cookie dough works wonderfully and adds a personal touch to your Monster Fudge Bars.
Can I make these bars gluten-free?
Yes, you can substitute gluten-free oats and use gluten-free chocolate chip cookie dough for a gluten-free version.
What can I use instead of peanut butter chips?
You can substitute with almond butter chips, chocolate chips, or any nut butter chips you prefer.
Can I make these bars ahead of time?
Yes! These bars can be made a day in advance, making them perfect for parties or gatherings.
Because You Liked This
If you enjoyed making Monster Fudge Bars, you might also love these recipes:
- Chocolate Chip Cookie Dough Brownies
- Peanut Butter Chocolate Chip Cookies
- Oatmeal Chocolate Chip Cookie Bars
- Loaded Chocolate Chip Cookies
Serve & Enjoy
There you have it! A delightful recipe for Monster Fudge Bars that will leave everyone asking for more. The combination of flavors, textures, and colors makes these bars not only a treat for the taste buds but also a feast for the eyes. Whether you’re serving them at a gathering or enjoying them at home, these bars are sure to bring smiles all around.
Now grab your ingredients, roll up your sleeves, and get ready to indulge in the ultimate chocolatey experience with these Monster Fudge Bars. Trust us, you won’t be able to stop at just one!

Monster Fudge Bars
Ingredients
- 2 cups refrigerated chocolate chip cookie dough
- 1/2 cup old fashioned or quick oats
- 1 cup mini M&M's
- 1 cup Reese's peanut butter chips
- 14 oz sweetened condensed milk
- 12 oz semisweet chocolate chips
- 1 tsp vanilla extract
Instructions
- Preheat your oven to 350°F (175°C). This ensures that your Monster Fudge Bars bake evenly and come out perfectly gooey.
- Line your 9x13 inch baking pan with parchment paper, leaving some overhang on the sides. This will make it easier to lift the bars out once they are cool.
- In a mixing bowl, take the 2 cups of refrigerated chocolate chip cookie dough and spread it evenly across the bottom of the prepared pan. Use your fingers or a spatula to press it down firmly.
- In a separate bowl, combine the oats and 1 cup of mini M&M's. Sprinkle this mixture over the cookie dough layer, distributing it evenly.
- In a microwave-safe bowl, combine the 1 cup of Reese's peanut butter chips with the 14 oz of sweetened condensed milk. Microwave in 30-second intervals, stirring in between, until smooth and well combined.
- Pour the melted peanut butter mixture over the oats and M&M's layer, spreading it out evenly with a spatula.
- Sprinkle the 12 oz of semisweet chocolate chips over the peanut butter layer, ensuring they are evenly distributed.
- Place the pan in the preheated oven and bake for 25-30 minutes, or until the edges are golden brown and the center is set. Be careful not to overbake!
- Once baked, remove the pan from the oven and let it cool at room temperature for about 30 minutes. Then, refrigerate for at least 2 hours to allow the bars to set completely.
- Once chilled, lift the bars out of the pan using the parchment paper overhang. Cut them into squares or rectangles and serve!
Equipment
- 9x13 inch baking pan
- Parchment Paper
- Mixing Bowls
- Spatula
- Oven
- Microwave-safe bowl
Notes
- Store bars in an airtight container at room temperature for up to 5 days or refrigerate for up to 2 weeks.
- Freeze wrapped bars up to 3 months; thaw in refrigerator before serving.
- Customize with different candies, nuts, or drizzled chocolate for variety.

