M&M Chocolate Chip Bars
These M&M Chocolate Chip Bars are a nostalgic, chewy tray bake that combines the best of two worlds: colorful candy-coated crunch and melty chocolate chip pockets throughout. The first bite delivers a buttery, sweet dough with a tender, slightly cakey center and crispy edges. Mini M&Ms add bursts of color and thin candy shell crunch, while semi-sweet chocolate chips give warm, gooey chocolate ribbons. Warm from the oven the bars smell intensely of butter, vanilla, and toasted sugar, filling the kitchen with an irresistible aroma that calls for an immediate taste test. These bars are ideal for school lunches, bake sales, casual parties, or an easy weekend treat when you want something faster than cookies but still shareable. They hold up well for slicing and packing, and they are a kid friendly favorite that adults will reach for again and again.
Ingredients
- 2 and 3/4 cups all-purpose flour, provides structure and the right chew.
- 1 and 1/2 teaspoons cornstarch, keeps the bars tender by softening the flour proteins.
- 1 teaspoon baking soda, gives a light lift and a slightly cakey texture.
- 1/2 teaspoon salt, balances sweetness and enhances flavor.
- 1 cup unsalted butter, melted and cooled, adds rich butter flavor and moistness.
- 1 cup packed light or dark brown sugar, brings deep caramel notes and chew.
- 1/2 cup granulated sugar, helps with edge crispness and sweetness.
- 2 large eggs, at room temperature, bind the dough and add richness.
- 2 teaspoons pure vanilla extract, provides warm aromatics and depth.
- 1 and 1/4 cups mini or regular-size M&Ms, colorful crunch and candy-coated sweetness.
- 3/4 cup semi-sweet chocolate chips, for melty pockets of chocolate throughout.
Step-by-Step Instructions
- Preheat the oven to 350°F (177°C) and position the oven rack in the center of the oven. Preheating ensures even baking from the start.
- Line a 9×13-inch baking pan with parchment paper. Leave enough parchment to lift the bars out later for easy slicing.
- In a medium bowl, whisk together the flour, cornstarch, baking soda, and salt until evenly combined. This distributes the leavening and salt.
- In a large bowl, stir the melted butter with the brown sugar and granulated sugar until smooth and well blended. Make sure the butter has cooled slightly so it does not cook the eggs in the next step.
- Add the eggs and vanilla extract into the butter mixture and mix until glossy. Mix until the eggs are fully incorporated and the mixture looks shiny.
- Pour the wet mixture into the dry ingredients and stir until just combined. Do not overmix to keep the bars tender.
- Fold in the M&Ms and chocolate chips until evenly distributed. For a prettier top, reserve a small handful of M&Ms to press on top before baking.
- Transfer the dough to the prepared pan and smooth it out into an even layer. Press gently so the surface is flat and the pieces bake uniformly.
- Bake for 26 to 30 minutes, or until lightly browned and a toothpick comes out mostly clean with a few moist crumbs. Edges will be set and the center slightly soft.
- Allow the bars to cool in the pan for at least one hour before cutting into squares. Cooling helps them firm up for clean slices.
Recipe Details
- Prep Time: 15 minutes
- Cook Time: 26 to 30 minutes
- Total Time: about 1 hour 45 minutes, including at least 1 hour cooling time
- Servings: about 24 bars
- Calories: approximately 245 to 260 calories per bar
Tips, Storage & Variations
- Tip: Let the melted butter cool to warm but not hot before adding eggs to prevent scrambling.
- Tip: If you want cleaner edges, chill the pan for 10 minutes after smoothing the dough, then bake.
- Storage: Store cooled bars in an airtight container at room temperature for up to 4 days. Separate layers with parchment to prevent sticking.
- Freezing: Wrap individual bars in plastic wrap and freeze in a sealed container for up to 3 months. Thaw at room temperature.
- Variation: Use mini M&Ms for a more even candy distribution, or regular-size M&Ms for larger bursts of candy in each bite.
- Variation: Increase the chocolate chip amount to 1 cup if you prefer a more chocolate-forward bar.
- Variation: Use either light or dark brown sugar from the recipe to slightly change the caramel depth.
FAQ
Q: Can I use salted butter instead of unsalted?
A: Yes, but reduce or omit the added salt to avoid an overly salty result.
Q: Do I need to soften the butter instead of melting it?
A: This recipe calls for melted and cooled butter for the right texture, so do not substitute with softened butter.
Q: Can I make these gluten free?
A: You would need a gluten free flour blend, but that changes the ingredient list, so follow a tested gluten free adaptation if desired.
Q: How do I know when the bars are done baking?
A: The bars are done when the edges are lightly browned and a toothpick inserted in the center comes out mostly clean with a few moist crumbs.
Q: Can I halve the recipe for a smaller pan?
A: Yes, but adjust baking time and use a smaller pan to keep thickness similar.
People Also Ask
Q: What is the best way to cut M&M bars cleanly?
A: Chill the bars, then use a sharp knife warmed under hot water and wiped dry between cuts.
Q: Are mini M&Ms better than regular for baking?
A: Mini M&Ms distribute more evenly through the dough, while regular M&Ms give larger candy pockets.
Q: Can I use milk chocolate chips instead of semi-sweet?
A: Yes, milk chocolate will make the bars sweeter and creamier, using only ingredients listed is allowed if you already have them.
Q: Why does my bar turn out too cakey?
A: Overmixing or too much leavening can cause a cakier texture; mix just until combined and follow the baking soda amount exactly.
Q: How do I prevent M&Ms from bleeding color into the dough?
A: Press some M&Ms on top after baking or use mini M&Ms for better distribution and less risk of color transfer.
Q: Can I bake these in a metal pan versus glass?
A: Both work fine; a metal pan browns edges faster, so watch the bake time toward the end.
Q: What is a good serving size for these bars?
A: One bar from a 24-piece pan is common and makes a satisfying snack portion.
Q: Can I make the dough ahead of time?
A: You can mix the dough and refrigerate it briefly, but for best results bake within 24 hours to keep texture optimal.
Conclusion
Give these M&M Chocolate Chip Bars a try for an easy, crowd-pleasing tray bake that balances buttery chew, chocolate pockets, and colorful candy crunch. They are simple to make, great for sharing, and forgiving enough for busy bakers. For another take on M&M cookie bars with a slightly different technique, see the EASY M&M Cookie Bars at I Heart Naptime. If you want a softer, extra-tender variation, check the Soft M&M Cookie Bars Recipe at Sally’s Baking Addiction. Enjoy baking and please share how your bars turned out with friends and family.
M&M Chocolate Chip Bars
Ingredients
Method
- Preheat the oven to 350°F (177°C) and position the oven rack in the center.
- Line a 9×13-inch baking pan with parchment paper, leaving enough to lift the bars out later.
- In a medium bowl, whisk together the flour, cornstarch, baking soda, and salt until evenly combined.
- In a large bowl, stir the melted butter with the brown and granulated sugars until smooth.
- Add the eggs and vanilla extract into the butter mixture and mix until glossy.
- Pour the wet mixture into the dry ingredients and stir until just combined.
- Fold in the M&Ms and chocolate chips until evenly distributed.
- Transfer the dough to the prepared pan and smooth it out into an even layer.
- Bake for 26 to 30 minutes, or until lightly browned and a toothpick comes out mostly clean.
- Allow the bars to cool in the pan for at least one hour before cutting into squares.