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Halloween Oreo Brownie Bars

Close-up of Halloween Oreo Brownie Bars

These festive Halloween Oreo Brownie Bars combine fudgy homemade brownies with crunchy Oreo cookies and spooky Halloween sprinkles. They’re the perfect treat for parties or a fun baking project with kids!

Ingredients

Scale
  • 1 box (18.3 ounces) brownie mix (plus ingredients called for on box)
  • 1/2 cup (1 stick) unsalted butter, melted
  • 1/4 cup vegetable oil
  • 2 large eggs
  • 1/4 cup milk
  • 1 teaspoon vanilla extract
  • 1 package (14.3 ounces) Oreo cookies, roughly chopped
  • 1/2 cup Halloween sprinkles

Instructions

  1. Preheat oven to 350°F (175°C). Grease and flour a 9×13 inch baking pan.
  2. Prepare brownie mix according to package directions, using melted butter, vegetable oil, eggs, milk, and vanilla extract.
  3. Pour half of the brownie batter into the prepared pan.
  4. Sprinkle the chopped Oreo cookies evenly over the brownie batter.
  5. Pour the remaining brownie batter over the Oreo cookies.
  6. Top with Halloween sprinkles.
  7. Bake for 25-30 minutes, or until a toothpick inserted into the center comes out with moist crumbs.
  8. Let cool completely before cutting into bars.

Notes

For extra fudgy brownies, underbake them slightly. Serve with a scoop of vanilla ice cream for a decadent dessert!