Oh, sweet friend, let me tell you about a recipe that brings me right back to my childhood kitchen. Remember those simple, joyful moments, maybe helping Mom or Grandma bake, the smell of warm cookies filling the air? These M&M Cookie Bars capture that feeling perfectly. They’re unbelievably easy, come together in a snap, and disappear even faster! Seriously, this is the recipe you pull out when you need a crowd-pleasing treat without any fuss. No scooping individual cookies, just mix, spread, bake, and slice. Pure cookie bliss in bar form!
Why You’ll Love This Recipe
- Fast: Seriously quick prep time – perfect for last-minute cravings or parties.
- Easy: No fancy techniques here! Simple steps anyone can follow.
- Giftable: Wrap these up in cute packages and spread some colorful joy.
- Crowd-pleasing: Who can resist a soft, chewy bar loaded with colorful M&Ms and chocolate?
Ingredients
Here’s what you’ll need to whip up these delightful bars. Most of these are probably already in your pantry!
- 320g (2⅔ cups) all-purpose flour: The base of our chewy bar.
- ½ tsp baking soda: Helps with lift and spread.
- ½ tsp baking powder: Adds a little extra puffiness.
- ¾ tsp salt: Balances the sweetness and brings out all the flavors. Don’t skip it!
- 226g (1 cup) unsalted butter, softened: Make sure it’s truly soft, like you can easily dent it with your finger, but not melted! This is key for that perfect texture.
- 220g (1 cup packed) light brown sugar: Packed brown sugar gives us that lovely moisture and chewiness.
- 100g (½ cup) granulated sugar: For sweetness and a little crispness on the edges.
- 2 large eggs, at room temperature: Room temperature eggs incorporate better into the batter. If you forget, pop them in a bowl of warm water for 10 minutes!
- 2½ tsp pure vanilla extract: Use good quality vanilla for the best flavor.
- 220g (1 cup) M&M candies (plus extra for topping): The star of the show! Use classic M&Ms or switch them up for holidays.
- 90g (½ cup) semisweet chocolate chips (plus extra for topping): Because you can never have too much chocolate!
How to Make It
Alright, let’s get baking! Follow these simple steps and you’ll have warm, gooey bars in no time.
1. First things first, let’s get the oven ready and prep our pan. Preheat your oven to 177°C (350°F). Grab a 9×13-inch metal baking pan – metal is best for even heating here. Grease it well, then line it with parchment paper, leaving a nice overhang on the two longer sides. This overhang is going to be your best friend for lifting the cooled bars out easily later!
2. In a medium bowl, whisk together your dry ingredients: the flour, baking soda, salt, and baking powder. Just a quick whisk to make sure everything is evenly distributed. Set this bowl aside for a moment.
3. Now, time for the wet ingredients! In a stand mixer fitted with the paddle attachment, or using a hand mixer and a large bowl, beat your softened butter, light brown sugar, and granulated sugar together on medium speed. Let it beat for a few minutes until it’s light, fluffy, and creamy. This step is important for incorporating air and getting that great texture.
4. Add your eggs one at a time, beating well after each addition. Then, stir in the vanilla extract. Don’t forget to stop and scrape down the sides and bottom of the bowl with a spatula as needed to make sure everything is getting mixed in evenly.
5. With your mixer on low speed (seriously, go slow here!), gradually add the dry ingredients to the wet ingredients. Mix just until everything is combined and you no longer see streaks of flour. Be careful not to overmix, or your bars could end up tough.
6. Now for the fun part! Grab a spatula or a sturdy wooden spoon. Gently stir in the M&Ms and semisweet chocolate chips. We want to fold them in, not beat them to death, so they stay intact and spread throughout the dough.
7. Transfer the delicious dough into your prepared 9×13-inch pan. It might seem a little thick, but that’s okay! Use your spatula or clean hands to press the dough evenly into the bottom and corners of the pan. Get it nice and flat so the bars bake evenly.
8. If you’re feeling extra, sprinkle a few more M&Ms and chocolate chips over the top of the dough. This makes them look extra pretty and irresistible once baked! Pop the pan into your preheated oven.
9. Bake for 20 to 25 minutes, or until the edges are lightly golden and the center looks set, maybe with a few slight cracks. Don’t overbake them if you want that super chewy center! They might look slightly underdone in the middle, but they will continue to set as they cool. Once baked, remove the pan from the oven and place it on a wire rack. Let them cool completely in the pan before attempting to cut them. Seriously, this is the hardest part – waiting! Using the parchment paper overhang, lift the cooled cookie slab out of the pan onto a cutting board. Cut into squares using a sharp knife. Now, finally, you can dig in!
Substitutions & Additions
This recipe is super versatile! Feel free to play around with it:
- Switch up the M&Ms: Use peanut M&Ms, peanut butter M&Ms, holiday-themed colors, or even mini M&Ms!
- Different Chips: Swap semisweet chips for milk chocolate, dark chocolate, white chocolate, or even butterscotch chips.
- Add Nuts: Stir in ½ cup of chopped walnuts or pecans with the M&Ms and chocolate chips for some crunch.
- Sprinkles: Fold in or sprinkle some festive sprinkles for extra fun, especially for birthdays or holidays.
- Other Candies: Chopped Reese’s Peanut Butter Cups, Heath bar bits, or chopped Oreos could be fun additions!
Tips for Success
- Room Temperature Ingredients: Make sure your butter and eggs are at room temperature. This helps them cream together properly with the sugar, leading to a better texture.
- Don’t Overmix: Once you add the flour, mix only until just combined. Overmixing develops the gluten in the flour, which can result in tough bars instead of chewy ones.
- Don’t Overbake: Watch the bake time carefully! The bars should look slightly golden on the edges and set in the center, but they shouldn’t be deeply browned. When in doubt, err on the side of slightly underbaked for chewier bars.
- Cool Completely: This is crucial! Letting the bars cool completely in the pan allows them to finish setting up. Trying to cut them too soon will result in a crumbly mess.
- Line the Pan: Using parchment paper with an overhang makes removing the cooled slab so incredibly easy. Trust me on this one!
How to Store It
Once the bars are completely cooled and cut, store them in an airtight container at room temperature. They will stay fresh and chewy for about 3-4 days. If you want to keep them longer, you can pop them in the fridge for up to a week, or freeze them for longer storage (see FAQs!).
FAQs
Q: Can I use cold butter or eggs?
A: While you technically can, using room temperature ingredients is highly recommended! It creates a smoother batter and better texture in the final bars. If you forget, check my tip above for quickly warming eggs.
Q: My bars turned out cakey, what went wrong?
A: This could be due to a couple of things: potentially overmixing the dough once the flour was added, or overbaking the bars. Make sure you’re mixing just until combined and watching the oven carefully – they should look slightly soft in the center when you pull them out.
Q: Can I freeze these cookie bars?
A: Yes! Once completely cooled and cut, you can freeze them in an airtight container or freezer bag for up to 2-3 months. For best results, place parchment paper between layers to prevent sticking. Thaw at room temperature.
Q: Do I have to use a metal pan?
A: Metal pans generally conduct heat more evenly and result in better baking for cookies and bars compared to glass pans. If you only have glass, the baking time might vary slightly, so keep an extra close eye on them.
Easy Chewy M&M Cookie Bars
Ingredients
Equipment
Method
- Step 1: Preheat your oven to 177°C (350°F). Grease a 9x13-inch metal baking pan well and line it with parchment paper, leaving an overhang on the two longer sides.
- Step 2: In a medium bowl, whisk together the all-purpose flour, baking soda, salt, and baking powder. Set aside.
- Step 3: In a stand mixer fitted with the paddle attachment, or using a hand mixer and a large bowl, beat the softened butter, light brown sugar, and granulated sugar together on medium speed for a few minutes until light, fluffy, and creamy.
- Step 4: Add the eggs one at a time, beating well after each addition. Then, stir in the pure vanilla extract. Scrape down the sides and bottom of the bowl as needed.
- Step 5: With the mixer on low speed, gradually add the dry ingredients to the wet ingredients. Mix just until everything is combined and you no longer see streaks of flour. Do not overmix.
- Step 6: Gently stir in the M&Ms and semisweet chocolate chips with a spatula or sturdy wooden spoon.
- Step 7: Transfer the dough into your prepared 9x13-inch pan. Use your spatula or clean hands to press the dough evenly into the bottom and corners of the pan.
- Step 8: Optionally, sprinkle a few more M&Ms and chocolate chips over the top of the dough.
- Step 9: Bake for 20 to 25 minutes, or until the edges are lightly golden and the center looks set (it might look slightly underdone in the middle). Remove the pan from the oven and place it on a wire rack. Let them cool completely in the pan. Using the parchment paper overhang, lift the cooled cookie slab out of the pan onto a cutting board. Cut into squares using a sharp knife.
