If you’re on the lookout for a treat that combines the comforting flavors of cookie dough, the crunch of oats, and the sweetness of chocolate and candy, you’ve landed in the right place. These Monster Fudge Bars are an indulgent dessert that will satisfy your sweet tooth and impress your friends. They’re great for parties, potlucks, or just a cozy night in. With layers of cookie dough, creamy fudge, and a sprinkle of colorful M&M’s, these bars are as delightful to the eyes as they are to the palate. Let’s dive into the world of Monster Fudge Bars!
Why Monster Fudge Bars is Worth Your Time

When it comes to desserts, Monster Fudge Bars stand out for several reasons. First, they are incredibly easy to make, requiring minimal effort while delivering maximum flavor. The combination of chocolate chip cookie dough and rich fudge creates a chewy, gooey texture that is hard to resist. Plus, the addition of oats gives these bars a slight chewiness while also making you feel a tad better about indulging in such a sweet treat. Lastly, they are versatile—feel free to customize them with your favorite candies or chocolate chips. You won’t regret making these bars!
What Goes In
- 2 cups refrigerated chocolate chip cookie dough – This forms the base of your bars, providing a rich and buttery flavor.
- 1/2 cup old fashioned or quick oats – Adds texture and a bit of heartiness to the bars.
- 1 cup mini M&M’s – These colorful candies not only add sweetness but also a fun visual appeal.
- 1 cup Reese’s peanut butter chips – For those who love the combination of chocolate and peanut butter.
- 14 oz sweetened condensed milk – This creates a luscious, creamy fudge layer that binds everything together.
- 12 oz semisweet chocolate chips – For a rich chocolate flavor that complements the sweetness of the bars.
- 1 tsp vanilla extract – Enhances the flavors, making your Monster Fudge Bars even more delicious.
Recommended Tools
- 9×13-inch baking pan – Ideal for baking and cooling your Monster Fudge Bars.
- Parchment paper – Helps in easy removal and cleanup.
- Mixing bowls – For combining ingredients effortlessly.
- Spatula – Perfect for spreading the cookie dough and fudge layers evenly.
- Measuring cups and spoons – Ensures accuracy in your ingredients, leading to better results.
Monster Fudge Bars — Do This Next

Step 1: Preheat Your Oven
Start by preheating your oven to 350°F (175°C). This ensures that your bars bake evenly.
Step 2: Prepare the Baking Pan
Line a 9×13-inch baking pan with parchment paper, leaving some overhang for easy removal later. This step is crucial for hassle-free serving.
Step 3: Mix the Base
In a large mixing bowl, combine the refrigerated chocolate chip cookie dough and oats. Use a spatula to mix until they are well incorporated.
Step 4: Spread the Mixture
Press the cookie dough mixture into the bottom of the prepared pan. Make sure it’s even and covers the entire base. This will be your delicious crust.
Step 5: Add the Fudge Layer
In a separate microwave-safe bowl, combine the sweetened condensed milk and semisweet chocolate chips. Microwave in 30-second intervals, stirring in between, until completely melted and smooth. Stir in the vanilla extract.
Step 6: Pour the Fudge Mixture
Pour the melted fudge mixture over the cookie dough crust in the pan, spreading it evenly with a spatula.
Step 7: Top with M&M’s and Peanut Butter Chips
Sprinkle the mini M&M’s and Reese’s peanut butter chips over the fudge layer, pressing them in slightly to ensure they stick.
Step 8: Bake
Bake in the preheated oven for about 25-30 minutes, or until the edges are golden and the center is set. Keep an eye on it to avoid over-baking.
Step 9: Cool and Cut
Allow the bars to cool completely in the pan on a wire rack. Once cooled, lift the bars out using the parchment paper and cut into squares.
Make It Fit Your Plan

- Nut-Free Option: Omit the peanut butter chips or replace them with a nut-free chocolate chip.
- Vegan Version: Use a vegan chocolate chip cookie dough and dairy-free chocolate chips.
- Gluten-Free: Substitute the cookie dough with a gluten-free version and ensure all other ingredients are certified gluten-free.
- Change the Toppings: Feel free to swap out the M&M’s and peanut butter chips for your favorite mix-ins, like chopped nuts, dried fruits, or different types of chocolate.
What Not to Do
- Don’t skip the lining of the baking pan; it makes removing the bars much easier.
- Avoid over-mixing the cookie dough and oats; this can make the bars tough.
- Don’t rush the cooling process; letting the bars cool completely is essential for clean cuts.
- Be careful not to overbake; they should be set in the middle but not dry.
Freezer-Friendly Notes
You can easily freeze Monster Fudge Bars for later enjoyment. Once they are completely cooled, cut them into squares and place them in an airtight container or a freezer bag, separating layers with parchment paper. They can be frozen for up to three months. When you’re ready to enjoy them, simply thaw them in the refrigerator overnight or at room temperature for a few hours.
Monster Fudge Bars FAQs
Can I use different types of chocolate chips?
Absolutely! Feel free to experiment with white chocolate chips, milk chocolate chips, or even butterscotch chips for a different flavor profile.
How do I store leftover Monster Fudge Bars?
Store them in an airtight container at room temperature for up to a week. If you prefer them chilled, you can keep them in the refrigerator as well.
Can I make these bars ahead of time?
Yes! They are perfect for making ahead of time. Just store them properly, and they will maintain their deliciousness for several days.
What if I don’t have sweetened condensed milk?
If you don’t have sweetened condensed milk on hand, you can substitute it with homemade versions or use a mixture of heavy cream and sugar, though the texture might vary slightly.
Time to Try It
Now that you’ve gathered all the ingredients and tools, it’s time to get baking! These Monster Fudge Bars are sure to become a new favorite in your dessert lineup. With their rich flavors and satisfying textures, they are perfect for sharing or enjoying all by yourself. Whip up a batch today and indulge in the delightful world of Monster Fudge Bars! Enjoy every delicious bite!

Monster Fudge Bars
Equipment
- 9x13 inch baking pan
- Parchment Paper
- Mixing Bowls
- Spatula
- Measuring cups and spoons
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) to ensure even baking.
- Line a 9x13-inch baking pan with parchment paper, leaving some overhang for easy removal later.
- In a large mixing bowl, combine the refrigerated chocolate chip cookie dough and oats. Mix well with a spatula.
- Press the cookie dough mixture evenly into the bottom of the prepared pan to form the crust.
- In a microwave-safe bowl, combine the sweetened condensed milk and semisweet chocolate chips. Microwave in 30-second intervals, stirring in between, until melted and smooth. Stir in vanilla extract.
- Pour the melted fudge mixture over the cookie dough crust, spreading evenly with a spatula.
- Sprinkle the mini M&M's and Reese's peanut butter chips over the fudge layer, pressing in slightly to stick.
- Bake for 25-30 minutes, until edges are golden and center is set. Avoid overbaking.
- Allow bars to cool completely in the pan on a wire rack. Lift out using parchment paper and cut into squares.
Notes
- Line the baking pan with parchment paper for easy removal and cleanup.
- Do not overmix the cookie dough and oats to keep bars tender.
- Let bars cool completely before cutting for clean slices.
- Freeze leftover bars up to three months, separating layers with parchment paper.
- Customize toppings by swapping M&M's and peanut butter chips with your favorite candies or nuts.
