These Reese’s Pieces Chocolate Chip Cookie Bars are the ultimate easy dessert—made with cake mix, loaded with chocolate chips, and topped with crunchy, colorful Reese’s Pieces. Soft, chewy, and irresistibly rich, these cookie bars come together in one bowl and are always a hit at parties, bake sales, or family movie nights. No mixer required!
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Why You’ll Love This Recipe
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Quick and easy: Just one bowl and no mixer required
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Kid-friendly and fun with bright Reese’s Pieces on top
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Perfect for parties, potlucks, and lunchbox treats
Ingredients Breakdown
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1 box yellow cake mix – The perfect shortcut base for soft, chewy cookie bars.
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1 stick (½ cup) melted butter – Adds richness and moisture.
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1 tsp vanilla extract – Enhances the flavor.
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2 large eggs – Bind the batter and add structure.
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2 cups chocolate chips – For maximum gooey, chocolatey goodness.
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1 small box Reese’s Pieces – Adds crunch, color, and peanut butter flavor on top.
Tips and Tricks
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Don’t overmix: Stir the batter just until combined for the best texture.
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Chill before slicing: For cleaner cuts, refrigerate the bars for 30 minutes after cooling.
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Double the chocolate: Use a mix of chocolate chips and chunks for extra gooeyness.
Variations and Customizations
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Peanut Butter Twist: Add ½ cup peanut butter to the batter.
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Holiday Version: Swap in seasonal M&M’s for festive flair.
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Nutty Crunch: Add chopped peanuts or walnuts to the mix.
Pairing Suggestions
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Serve with a glass of cold milk, a hot cup of coffee, or a peanut butter milkshake.
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Add a scoop of vanilla ice cream and drizzle with chocolate syrup for a decadent dessert.
Storage Instructions
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Room temperature: Store in an airtight container for up to 4 days.
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Refrigerate: Keeps for up to 1 week if chilled.
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Freeze: Wrap bars individually and freeze for up to 2 months.
Popular Questions
Can I use different cake mix flavors?
Yes! Try chocolate, white, or even spice cake mix for fun variations.
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Can I make these gluten-free?
Use a gluten-free yellow cake mix and ensure your other ingredients are certified gluten-free.
Do I have to use Reese’s Pieces?
Nope—swap in M&M’s, peanut butter chips, or crushed peanut butter cups!
Reese’s Pieces Chocolate Chip Cookie Bars
- Total Time: 30–35 minutes
- Yield: 24 bars
Description
Cake mix magic! Soft, chewy bars packed with chocolate chips and crunchy Reese’s Pieces—easy, colorful, and so addictive
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Ingredients
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1 box yellow cake mix
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2 cups chocolate chips
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1 small box Reese’s Pieces
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1 stick (½ cup) unsalted butter, melted
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2 large eggs
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1 teaspoon vanilla extract
Instructions
1. Preheat and Prep
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Preheat your oven to 350°F (175°C).
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Grease or line a 9×13-inch baking dish with parchment paper for easy removal.
2. Mix the Batter
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In a large bowl, combine the yellow cake mix, melted butter, vanilla extract, and eggs.
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Stir until the batter is smooth and fully combined.
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Fold in the chocolate chips.
3. Press and Top
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Press the dough evenly into the prepared baking dish.
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Sprinkle the Reese’s Pieces over the top, gently pressing them into the batter.
4. Bake
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Bake for 20–25 minutes, or until the edges are golden and the center is just set.
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Avoid overbaking for a soft and chewy texture.
5. Cool and Slice
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Let the bars cool in the pan for at least 15 minutes.
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Slice into squares or rectangles and serve.
Notes
These bars are foolproof and always a hit—especially with kids. They come together in minutes and disappear just as fast!
Would you like a printable recipe card or a Pinterest pin description to go with this?
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- Prep Time: 10 minutes
- Cook Time: 20–25 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
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