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Gooey Triple Layered Brownies: Slutty Brownies with Peanut Butter & Oatmeal Chocolate Chip

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These triple layered brownies recipe serves up three layers of peanut butter and fudgey goodness. Over-the-top indulgence meets 100% deliciousness. One oatmeal chocolate chip cookie layer, one creamy peanut butter sandwich cookie layer, and one fudgey brownie layer. Baked together to create the most delicious triple layered brownies! Yum, yum!

A cross section photo of triple layered brownies made from cookie dough, peanut butter cookies and brownie. The brownies are stacked.

Say Hello to My Favorite Triple Layer Brownies!

I originally saw the idea for triple layer brownies with cookies over on Kevin & Amanda and fell in love.

As a chocolate lover, I will try nearly anything that has chocolate as the main ingredient. But, I’m also obsessive about trying to give recipes things my own special twist and extra oompf.

When a family gathering came up, I decided to try my hand a making my own version of these triple layer brownies instead of my go to Easy Fudge Brownies, Andes Mint Brownies, Cookie Dough Brownies, or Zucchini Brownies.

And oh my, are they ever delectable!

While most triple layer brownies recipes use Oreos as the middle “cookie layer,” I wanted to try something different. In keeping with using sandwich cookies (i.e. Oreos), I chose peanut butter sandwich cookies to inject some creamy peanut butter goodness into the brownies. In this case, I bought them instead of using my homemade Peanut Butter Sandwich Cookies.

For the cookie dough layer, I chose oatmeal chocolate chip – again, I bought this instead of making it!

And thus, my triple layer brownies were born.

What’s So Special About Triple Layer Brownies?

These brownies consist of an oatmeal chocolate chip cookie layer, topped with a peanut butter sandwich cookies layer, topped with an ooey, gooey fudge brownie layer.

The sandwich cookies must absorb some of the moisture from the batter or something scientific like that… all I know is they stay together in sandwich form, but they aren’t crunchy at all. Just part of the all-over goodness. Definitely worth the calories.

I’m always pressed for time when I make these, so I like to combine some “from scratch” layers and some store-bought layers.

For me, it was much more important that my brownies be home-made vs brownie mix from a box. So I use box mix for the cookie dough layer. 

You could make both the cookie dough and brownie layers from scratch, or use mixes for both. You can also swap the flavors of the cookie dough layer and the sandwich cookie layer!

Why are Triple Layered Brownies Sometimes Called Slutty Brownies?

For some reason, triple layered brownies have gained the rather rude nickname of ‘slutty brownies’ over the years. But what makes them slutty?

As far as I can tell, triple layered brownies as we know them were originally published by Kevin & Amanda (my original inspiration, too!)

Then The Londoner published her own version, re-naming them slutty, because they’re easy and they’re filthy!

A cross section photo of triple layered brownies made from cookie dough, peanut butter cookies and brownie. The brownies are stacked on a white plate.

My Unique Take on Slutty Triple Layered Brownies

Triple layered brownies basically have some things in common, and you can mix and match and experiment:

  • One layer made from cookie dough
  • One layer made from sandwich cookies
  • One layer made from brownies

In this version, I use oatmeal chocolate chip cookie dough as my cookie dough layer and peanut butter sandwich cookies as my cookie layer.

How to Make My Triple Layer Brownies

As mentioned above, you need one brownie layer (made from scratch or store bought brownie mix), 1 cookie dough layer (made from scratch or store bought) and 1 cookie layer (I used store bought peanut butter sandwich cookies, but you can choose your flavor).

Now for making them – they are super simple as you’ll see!

Layer the cookie dough on the bottom of a 9×9 baking pan, pressing down to form the crust.

Layer the sandwich cookies on top of the cookie dough. No need to overlap. One single layer will do.

A recipe process photo showing one step in how to make triple layered brownies. The image shows 14 peanut butter sandwich cookies layered on top of a cookie dough crust.

Pour the brownie batter on top of the sandwich cookie layer and spread evenly.

Bake for 30-35 minutes and check. Use a knife to check: you want it to come out clean, with no batter.

Sit back and enjoy – you’ve got yourself some ooey gooey goodness!

A cross section photo of triple layered brownies made from cookie dough, peanut butter cookies and brownie.
Yield: 16

Triple Layered Brownies (Aka Slutty Brownies)

Triple Layered Brownies (Aka Slutty Brownies)

These triple layered brownies recipe serves up three layers of peanut butter and fudgey goodness. Over-the-top indulgence meets 100% deliciousness. One oatmeal chocolate chip cookie layer, one creamy peanut butter sandwich cookie layer, and one fudgey brownie layer. Baked together to create the most delicious triple layered brownies! Yum, yum!

Prep Time 30 minutes
Cook Time 30 minutes
Total Time 1 hour

Ingredients

  • For the Brownie layer:
  • 10 tbsp butter
  • 1 1/4 cups granulated sugar
  • 3/4 cup cocoa powder
  • 1/2 tsp salt
  • 2 tsp vanilla extract
  • 2 large eggs
  • 1/2 cup all purpose flour
  • For the sandwich cookie layer:
  • 16 sandwich cookies (I used peanut butter, you pick the flavor)
  • For the Cookie Dough layer:
  • 1 box mix of cookie dough made according to package instructions (I used oatmeal chocolate chip cookies but you can pick your flavor)

Instructions

  1. Preheat oven to 350 degrees F. Line a 9x9 baking pan with tin foil, and spray the foil with a layer of baking spray.
  2. Prepare Your Brownie Layer and Set Aside - In a medium sauce pan, melt the butter over medium high heat. Add the sugar and cocoa powder once the butter is melted. Whisk to combine and remove from heat. Add the salt, vanilla and eggs and continuously whisk until the eggs are combined. Add the flour and continue to mix. Set batter aside.
  3. Prepare Your Cookie Dough Layer and Set Aside - Prepare cookie dough according to instructions on the box.
  4. Assemble Your Triple Layered Brownie. Lay the raw cookie dough onto the bottom of your pre-sprayed 9×9 baking pan, pressing down to form the crust on top of the tin foil. Layer the sandwich cookies on top of the cookie dough in a single layer. No need to overlap. Pour the brownie batter on top of the sandwich cookie layer and make sure it’s spread evenly on top.
  5. Bake for 30-35 minutes. Test with a knife to see if the center is done. If the knife comes out clean, let the brownies rest before serving. If the knife comes out with batter still on it, allow the brownies to bake about 5 minutes more.

Notes

Instead of making the brownie layer from scratch, you could easily substitute it for a store bought brownie mix to save time. This will probably save about 15 minutes, cutting the total recipe time down to 45 minutes.

Similarly, you can use refrigerated cookie dough from the store, or make your own cookie dough from scratch.

Feel free to experiment with flavors for your cookie dough base (I used oatmeal chocolate chip) and your cookie layer (I used peanut butter sandwich cookies).

You definitely don't want to overcook this recipe, so err on the side of caution when baking. Slightly oozing chocolate is one of the best parts!

Nutrition Information:

Yield:

16

Serving Size:

1

Amount Per Serving: Calories: 287Total Fat: 12gSaturated Fat: 6gTrans Fat: 0gUnsaturated Fat: 5gCholesterol: 45mgSodium: 319mgCarbohydrates: 41gFiber: 2gSugar: 20gProtein: 6g

Nutritional information was guesstimated by a third-party tool, and I make no claims as to its accuracy.

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Precious Crafts

Wednesday 18th of June 2014

Yummy, definitely! Thanks for sharing this wonderful recipe - glad that you're not using metric measurement. :D

Rachel Cotterill

Friday 10th of February 2012

Those sound amazing :)

masalachica.com

Thursday 9th of February 2012

That cake looks like it should be banned on the continental U.S.

But why am I still salivating. Darn it! Was doing so good being healthy too :-)

Kate @ craftwhatever

Tuesday 7th of February 2012

O WOW! Those look awesome! Great photo, too!!

Susan

Tuesday 7th of February 2012

I'm going to blame you if I start gaining weight! Just looking at the pictures must be thousands of calories! =)

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