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several Oreo brownies cut into perfect squares on a light marble surface
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Oreo Brownies

These Oreo Brownies are thick, fudgy, chewy, and packed with chopped Oreo cookies. An easy homemade brownie recipe ready in under an hour.
Prep Time 15 minutes
Cook Time 30 minutes
Total Time 45 minutes
Servings 9 large or 16 small brownies
Author Tessa Arias

Ingredients

  • 5 tablespoons (71 grams) unsalted butter
  • 1 1/4 cups (249 grams) granulated sugar
  • 2 large eggs plus 1 egg yolk, cold
  • 1 teaspoon vanilla extract
  • 1/3 cup (74 grams) neutral oil (like vegetable or avocado)
  • 3/4 cup (75 grams) Dutch-process cocoa powder
  • 1 tablespoon (5 grams) black cocoa powder*
  • 1/2 cup (63 grams) all-purpose flour, measured correctly
  • 1 tablespoon cornstarch
  • 1/2 teaspoon fine sea salt
  • 1/2 cup (85 grams) semisweet chocolate chips
  • 12 (136 grams) chocolate sandwich cookies, coarsely chopped and divided

Instructions

  • Preheat the oven to 325°F. Line an 8 by 8-inch light-colored metal pan** with foil or parchment paper and spray with nonstick cooking spray.
  • In a large microwave-safe bowl, melt the butter. Whisk in the sugar. Allow to cool until just warm, then whisk in the eggs and egg yolk, whisking vigorously for 1 minute. Whisk in the vanilla, oil, and cocoa powders.
  • With a rubber spatula, stir in the flour, cornstarch, and salt until combined. Stir in the chocolate chips and half the Oreo pieces. Spread the brownie batter evenly into the prepared pan. Top with the remaining Oreo pieces, pressing in slightly.
  • Bake for 30-32 minutes, or until the brownies are set and a cake tester inserted into the center has moist crumbs attached. Let cool completely to solidify before cutting and serving.
  • Brownies can be stored in an airtight container at room temperature for up to 3 days. Brownies will be gooey when served warm, chewy when served at room temperature, and fudgy when served chilled.

Notes

*Black cocoa intensifies the Oreo flavor. It can most easily be found online. Skip it if you don’t have any.
** I do not recommend using a glass or ceramic pan to bake these brownies. If that's all you have, increase the baking time anywhere from 5-10 minutes.

Recipe Link

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