Irresistible Reese’s Pieces Cookie Bars combine the perfect balance of chewy cookie texture with the iconic candy-coated peanut butter gems we all love. These delectable treats satisfy both peanut butter lovers and cookie enthusiasts alike, making them an instant hit at any gathering. With the irresistible combination of sweet, salty, and buttery flavors, these Reese’s Pieces Cookies in bar form deliver maximum flavor with minimal effort.
Nutritional Benefits
While these treats are certainly an indulgence, they do offer some nutritional benefits. The peanut butter component provides protein and healthy fats, while the oats (if included in your cookie base) offer fiber. Moderation is key to enjoying these delicious bars as part of a balanced diet.
| Nutrition | Amount per Serving |
|---|---|
| Calories | 295 |
| Carbohydrates | 35g |
| Fat | 15g |
| Protein | 5g |
| Sugar | 22g |
| Fiber | 1g |
Ingredients & Substitutions

Creating the perfect cookie bars starts with quality ingredients. Here’s what you’ll need and potential swaps if you’re missing something:
| Ingredient | Role | Possible Substitutions |
|---|---|---|
| 1 cup unsalted butter, softened | Provides moisture and richness | Margarine, coconut oil (for dairy-free option) |
| 1 cup brown sugar, packed | Sweetness and moisture | Coconut sugar, date sugar |
| 1/2 cup granulated sugar | Sweetness and structure | Raw cane sugar, monk fruit sweetener (reduced amount) |
| 2 large eggs | Binding and structure | Flax eggs (2 Tbsp ground flaxseed + 6 Tbsp water) |
| 1 tsp vanilla extract | Flavor enhancer | Almond extract (use half the amount) |
| 1/2 cup creamy peanut butter | Flavor and moisture | Almond butter, sun butter (for allergies) |
| 2 1/4 cups all-purpose flour | Structure | 1:1 gluten-free baking flour, whole wheat pastry flour |
| 1 tsp baking soda | Leavening agent | 1 tsp baking powder (will result in slightly different texture) |
| 1/2 tsp salt | Flavor enhancer | Omit if using salted butter |
| 1 1/2 cups Reese’s Pieces | Main flavor component | M&Ms, chocolate chips + peanut butter chips |
Equipment Needed
– 9×13 inch baking pan
– Parchment paper
– Mixing bowls (large and medium)
– Electric mixer (stand or hand)
– Rubber spatula
– Measuring cups and spoons
– Wire cooling rack
Step-by-Step Instructions

Creating these Irresistible Reese’s Pieces Cookie Bars is straightforward with these easy-to-follow steps:
1. Preheat and prepare: Set your oven to 350°F (175°C). Line your 9×13 inch baking pan with parchment paper, leaving some overhang for easy removal later.
2. Cream the butter and sugars: In a large mixing bowl, beat the softened butter, brown sugar, and granulated sugar together until light and fluffy, about 2-3 minutes.
3. Add wet ingredients: Beat in the eggs one at a time, then add vanilla extract and peanut butter. Mix until smooth and well incorporated.
4. Combine dry ingredients: In a separate bowl, whisk together the flour, baking soda, and salt.
5. Combine wet and dry: Gradually add the dry ingredients to the wet mixture, mixing on low speed until just combined. Don’t overmix.
6. Fold in the candy: Gently fold in 1 cup of the Reese’s Pieces Cookies candies, saving the remaining 1/2 cup for topping.
7. Press into pan: Spread the dough evenly into your prepared pan, pressing it into the corners.
8. Add remaining candy: Sprinkle the reserved 1/2 cup of Reese’s Pieces on top, gently pressing them into the dough.
9. Bake: Place in the preheated oven for 22-25 minutes, or until the edges are golden and the center is just set. Don’t overbake—they will continue to firm up as they cool.
10. Cool completely: Allow to cool in the pan for at least 1 hour before lifting out using the parchment paper handles.
11. Slice and serve: Cut into squares or rectangles and enjoy!
Troubleshooting & Pro Tips
– Bars too crumbly? You might have overbaked them. Next time, check them a few minutes earlier.
– Too soft in the center? They may need more time in the oven. If the edges are browning too quickly, cover with foil.
– Pro tip #1: Refrigerate the dough for 30 minutes before baking for a thicker, chewier cookie bar.
– Pro tip #2: For extra decadence, drizzle melted peanut butter or chocolate over cooled bars.
– Pro tip #3: Line your pan with parchment paper extended over the sides for easy removal and clean cutting.
– Pro tip #4: Slightly underbake for ultra-chewy centers—the residual heat will finish cooking them.
Storage & Make-Ahead Tips
These cookie bars store beautifully, making them perfect for advance preparation:
– Room temperature: Store in an airtight container for up to 5 days.
– Refrigerator: Keep for up to 1 week for firmer texture.
– Freezer: Wrap individual bars in plastic wrap, then place in a freezer bag for up to 3 months. Thaw at room temperature before serving.
– Make-ahead tip: Prepare the dough up to 2 days in advance and refrigerate in an airtight container until ready to bake.
Conclusion
These Irresistible Reese’s Pieces Cookie Bars deliver the perfect balance of chewy cookie texture and peanut butter candy goodness. Whether you’re making them for a bake sale, potluck, or just a special treat at home, these crowd-pleasing bars are sure to disappear quickly. The beauty of these Reese’s Pieces Cookies in bar form is that they’re easier than making individual cookies but deliver all the same delicious flavors. Try them once, and they’ll become a regular in your dessert rotation!

FAQ
Q: Can I use chunky peanut butter instead of smooth?
A: Yes! Chunky peanut butter will add extra texture to your cookie bars.
Q: How do I know when the bars are done baking?
A: The edges should be lightly golden, and the center should be set but still soft. A toothpick inserted should come out with a few moist crumbs.
Q: Can I make these gluten-free?
A: Absolutely! Use a 1:1 gluten-free baking flour blend for excellent results.
Q: What if I don’t have Reese’s Pieces?
A: You can substitute with regular Homemade Reese’s Eggs chopped up, or use a combination of chocolate chips and peanut butter chips.
Q: Can I double this recipe?
A: Yes, you can double it and bake in two 9×13 inch pans, or use a larger sheet pan and adjust baking time accordingly.
Q: My bars are too soft in the middle. What went wrong?
A: They may have been underbaked. Every oven is different, so you might need a few extra minutes of baking time.
Q: Can I add other mix-ins?
A: Definitely! Try adding chocolate chips, chopped nuts, or even pretzels for a sweet-salty crunch.
Follow me on Pinterest for more Irresistible Reese’s Pieces Cookie Bars.



