Slutty Brownies
This delicious treat has a cookie dough layer topped with Oreos and crowned with a fantastic brownie layer. Super-indulgent and totally delicious!

- Prep time
- 20 min
- Cook time
- 35 min
- Yield
- 16 servings
- Difficulty
- MEDIUM
Ingredients
Quantities are shown as originally provided.
- 1 cup unsalted butter (softened, 226g)
- ¾ cup brown sugar (150g)
- 1/2 cup granulated sugar (100g)
- 1 egg
- 2 tsp. vanilla extract (10mL)
- 2 cups all-purpose flour (240g)
- 1 ¼ tsp. kosher salt
- ½ tsp. baking powder
- ¼ tsp. baking soda
- 1 cup semi-sweet chocolate chips
- ½ cup quick oats
- 18 chocolate sandwich cookies (such as Oreos)
- 3/4 cup unsalted butter (melted)
- ½ cup brown sugar (100g)
- ½ cup granulated sugar (100g)
- 2 tsp. vanilla extract (10mL)
- 2/3 cup cocoa powder (65g)
- ½ cup all-purpose flour (60g)
- 2 tsp. espresso powder
- ½ tsp. kosher salt
- ½ tsp. baking powder
- 2 eggs
- ½ cup semi-sweet chocolate chips
Instructions
- 1
Make the Cookie Dough:
- 2
Using a stand or hand mixer, beat butter and sugars in a bowl until creamy, about 2 minutes. Beat in egg and vanilla until combined.
- 3
In a separate bowl, stir together flour, salt, baking powder, and baking soda. Gradually add flour mixture to butter mixture, beating on low speed until just combined.
- 4
Fold in both chocolates and oats until just combined (do not overbeat).
- 5
Divide dough in half; spread half of dough in an even layer in the bottom of a foil-lined, greased 9x9-inch baking pan. Set pan aside while making brownie layer.
- 6
Refrigerate remaining dough for 15 minutes; reserve for additional cookies (see note below).
- 7
Make the Cookie Layer:
- 8
Place the Oreos on top of the cookie dough layer; breaking cookies to fit, as needed.
- 9
Make the Brownie Layer:
- 10
Preheat oven to 350°F. Mix the cocoa powder, flour, espresso powder, and baking powder in a bowl then set aside.
- 11
In a medium bowl, beat together melted butter, sugars, eggs, and vanilla. Mix very well as this step gives you that nice brownie top.
- 12
Sift the dry mixture into the butter mixture; stir until no streaks remain then fold in the chocolate chips.
- 13
Pour brownie batter over Oreo layer; gently smooth top with an offset spatula.
- 14
Bake at 350° until a wooden pick inserted comes out mostly clean, 35 to 40 minutes.
- 15
For best slicing results, let cool completely, about 2 hours.
- 16
Using foil as handles, lift brownies from pan. Discard foil; cut brownies into desired shapes.
- 17
Store in an airtight container up to 3 days, or refrigerate up to 1 week, if you can resist them that long!