Peanut Butter Party Brownies

A party-style brownie loaded with Reese’s Pieces and crunchy cookies!

Peanut Butter Party Brownies are all about fun textures and classic flavors. A rich brownie base gets topped with crunchy frosted animal cookies, Reese’s Pieces, a drizzle of peanut butter, and sprinkles. They’re simple to make, full of crunch, and perfect for sharing when you want brownies that feel a little more special.

Why You’ll Love This Recipe

• Rich, fudgy brownies with a chocolate peanut butter flavor.
• Crunchy frosted animal cookies add a funfetti-style texture.
• Reese’s Pieces bring color, crunch, and classic peanut butter taste.
• Made with a boxed brownie mix for a reliable, semi-homemade dessert.
• Perfect party brownies for birthdays, bake sales, and easy celebrations.

Ingredient Notes

• Brownie mix: Reese’s brownie mix gives you a rich chocolate base with built-in peanut butter flavor. Any fudgy brownie mix will work if needed, but this one really leans into the theme.
• Frosted animal cookies: These add the funfetti-style crunch and that classic frosted sweetness. Crush them into bite-size crumbs so they stay crunchy without overpowering the brownies.
• Reese’s Pieces: These bring crunch, color, and peanut butter flavor without melting into the batter. Sprinkle them evenly so every slice gets that signature pop.
• Peanut butter: Warming the peanut butter makes it easy to drizzle. Smooth peanut butter works best here for clean lines and even coverage.
• Sprinkles: Rainbow sprinkles keep the party vibe going. Add them right before baking so they stick to the top and bake in nicely.

Quick Prep Notes

Can I use Reese’s Pieces instead of peanut butter cups?
Yes. Reese’s Pieces work perfectly here and give you more crunch and color since they hold their shape while baking.

What pan size works best for these brownies?
An 8-inch pan gives thicker, fudgier brownies. A 9-inch pan makes slightly thinner bars with more surface crunch. Both work well.

Do I need to crush the animal cookies finely?
No. Crush them into small chunks, not powder. You want noticeable cookie pieces for texture and crunch.

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FAQ

Can I use a different brownie mix?
Yes. Any fudgy brownie mix will work, but a chocolate or peanut butter–style mix pairs best with the toppings.

Will Reese’s Pieces melt in the oven?
They soften slightly but keep their shape, which makes them great for adding crunch and color on top.

Should I mix the toppings into the batter?
No. Sprinkling them on top keeps the textures distinct and gives the brownies that layered look.

How do I store these Peanut Butter Party Brownies?
Store them covered at room temperature for up to 3 days or refrigerate for up to 5 days.

Can I freeze these brownies?
Yes. Slice once cooled, wrap tightly, and freeze for up to 2 months. Thaw at room temperature before serving.

Sprinkle of Fun

Make these Peanut Butter Party Brownies as a surprise treat for a peanut butter lover. Bake them the day before a birthday or celebration, slice them into neat squares, and bring them out when no one is expecting dessert. The mix of Reese’s Pieces, cookies, and sprinkles makes every bite feel like a party!