Black Cocoa Double Chocolate Cookies

Yield
one dozen 3 inch (7.6 cm) cookies
Prep time
15 mins
Cook time
9-11 mins per tray
Total time
about 45 mins

Experience the magic of black cocoa in my double chocolate cookies, where the alkalization process enhances the cocoa's flavor and contributes to a darker color. Black cocoa powder imparts an Oreo-like chocolate taste, while the addition of dark chocolate chunks adds depth and texture. 

Here's an instagram short video on the science behind this cookie recipe:

Step by step:

Coming soon :)

Video

Read this before you begin

Measure by weight, if possible.

Measuring by weight is the best way for you to replicate my recipes. I develop recipes using ingredients (even liquids) measured in grams, which is why you see them listed first in the recipe cards. For measurements under 5 grams, I will typically only list the volumetric measurements (teaspoons, etc.), as most home scales are not precise for such small weights.

In most cases, I have converted grams to volumetric measurements (aka US customary units) for bakers who prefer this method. However, the measurements are not as precise and may have awkward proportions. The recipes should still work, but for the ultimate precision, try to use weight.

This is the OXO scale I use daily. I also purchased this budget version of a good scale, which I keep at my Mom’s house for baking. If you’re interested in other tools I use for my baking, I’ve compiled a list here.

Use room temperature ingredients.

All my ingredients should be used at room temperature, or 65-75 °F/18-24 °C. I will always indicate if you need something outside this range. If no details are given, room temperature is the default. 

Pay attention to the ingredient descriptions.

I try not to be brand-specific, but I will always note an interesting result from a type of ingredient, be it negative or positive. 

A specific note regarding salt: I use Diamond Crystal Kosher salt for everything on this site except for frostings. In frostings, you want the salt to dissolve more easily, and kosher salt tends to leave granules behind. If you substitute table salt (more finely granulated) for recipes that list kosher salt, you must use half the volume indicated in my recipes.

Substitutions are hard.

That’s not to say they’re impossible, though. For instance, in many cases, substituting reduced fat for whole milk (and thus reducing fat by less than 2%) will probably be fine. Using applesauce for oil or even Greek yogurt when sour cream is listed will definitely alter the fat content and adversely affect the crumb texture and density of the cake.

I experiment for hours to get these recipes to work for us. First, try to make them as written or use one of my tested substitutions, which I often dedicate a section to. Then, if necessary, you can make modifications afterward. Even then I would be pretty cautious, as substitutions are one of the hardest things to investigate in recipe development.

Read all the recipe instructions before beginning.

I’m in the “Pre-read the Chapter before Class Lecture” club... and I invite you to join! Baking new recipes can be intimidating, so let’s set you up for success. I want you to think about timeframes. Most fillings and frostings can be made ahead of time, and give you an extra day for mental space. Also, as you become a more proficient baker, you can anticipate and recognize steps. (“Oh, this has a meringue step, so I’ll need an extra clean bowl…” etc.) Ensure you go down the ingredient list and have everything at the right temperature.

Black Cocoa Brownies

Yield
one dozen 3 inch (7.6 cm) cookies
Prep time
15 mins
Cook time
9-11 mins per tray
Total time
about 45 mins

Ingredients

  • 57 g (¼ cup) unsalted butter, room temp
  • 1 large (50 g) egg, cold from fridge
  • 11 g (2 tablespoons) black cocoa*
  • 6 g ( 1 tablespoon) Dutch-processed cocoa
  • 53 g (¼ cup) brown sugar
  • 50 g (¼ cup) white sugar
  • ½ teaspoon kosher salt
  • ¼ + ⅛ teaspoon cream of tartar**
  • 1 teaspoon vanilla extract
  • 60 g (½ cup) all-purpose flour, unbleached
  • 113 g (4 ounces) chocolate chunks from a bar***
  • About 1 extra ounce of chopped chocolate for decoration (optional but pretty)
  • 57 g (¼ cup) unsalted butter, room temp
  • 1 large (50 g) egg, cold from fridge
  • 11 g (2 tablespoons) black cocoa*
  • 6 g ( 1 tablespoon) Dutch-processed cocoa
  • 53 g (¼ cup) brown sugar
  • 50 g (¼ cup) white sugar
  • ½ teaspoon kosher salt
  • ¼ + ⅛ teaspoon cream of tartar**
  • 1 teaspoon vanilla extract
  • 60 g (½ cup) all-purpose flour, unbleached
  • 113 g (4 ounces) chocolate chunks from a bar***
  • About 1 extra ounce of chopped chocolate for decoration (optional but pretty)

Instructions

  1. Prep the ovens, pans, and chocolate.
    Ensure you have a rack in the center of your oven and preheat it to 375 °F (190 °C). Line cookie sheets with parchment paper or silicone baking mats.

    Chop your chocolate bar into approximately ¼ inch (½ cm) pieces. 
  1. Make the cocoa powder-butter mixture.
    In a large mixing bowl, add the butter, cold egg, cocoa powders, sugars, salt, and cream of tartar. Mix on medium-high speed until fully combined.

    Continue to mix on medium speed for about 2-3 minutes to thicken the mixture and evenly distribute the cream of tartar to neutralize the black cocoa. (Don’t skimp on the time here, this reduces bitterness and the cookie's spread while baking.)

  2. Stir in the vanilla extract, flour, and chocolate.
    With a spatula, slowly mix in the vanilla extract, then the flour, and last, the 4 ounces of chopped chocolate pieces.
  1. Bake for 9-11 minutes.
    Use a #30 cookie scoop (a little underfilled) or a spoon to scoop 1 ¾ tablespoon balls of dough onto your prepared cookie sheet about 2 inches apart. I like to do about 8 cookies per sheet.

    It’s hard to see when chocolate cookies are done baking, so use shape as an assessment for doneness. At the beginning of the baking process, these cookies will pool out into a thin batter, leaving most of the lumps of chocolate in the middle. Near the quarter-end of baking, the pooled batter will start to puff up. They are done when the cookie is evenly and thinly puffed, but the center may be just a smidge wet-looking. They will be irregular in shape and have tiny air bubbles along the surface. 
  2. Allow the cookies to cool on the pan.
    These cookies are super soft out of the oven, so let them sit on the hot pan for about 5 minutes before attempting to move them onto a cooling rack.

    While they are still warm, use a circular object, such as a large circle cookie cutter, bowl turned upside down, or lid of a jar, and slide each cookie around on the hot cookie sheet to get a more circular shape. It’s optional, but it makes your cookies look more polished.

    Take the extra chocolate set aside to decorate the tops of the cookies. Sprinkle on a bit of large, flaky salt if you wish. 

    When they cool completely, they are soft and wonderfully fudgy, and if you keep them in an airtight container, they stay that way for about 2 to 3 days after baking.

Adriana's Notes

*Black cocoa powder is a processed form of natural cocoa powder with a deep, dark color and a rich, intense flavor, often with a slightly bitter and earthy undertone. It’s sometimes hard to source in stores, so I buy mine online. For these cookies, I prefer (in this order) King Arthur Flour Black Cocoa, Cacao Barry Noir Intense, Magic Mountain Black Cocoa, and Cocoa Trader black.

**Cream of tartar is an acidic white powder found in the spice aisle. It reduces the cookie's spread and neutralizes the bitter, alkaline flavors of black cocoa. 

***You can use any type of chocolate here, and I prefer dark chocolates with this cookie. White chocolate would be a good choice too for color, textural, and sweetness contrast, but I have yet to try it.

  • 57 g (¼ cup) unsalted butter, room temp
  • 1 large (50 g) egg, cold from fridge
  • 11 g (2 tablespoons) black cocoa*
  • 6 g ( 1 tablespoon) Dutch-processed cocoa
  • 53 g (¼ cup) brown sugar
  • 50 g (¼ cup) white sugar
  • ½ teaspoon kosher salt
  • ¼ + ⅛ teaspoon cream of tartar**
  • 1 teaspoon vanilla extract
  • 60 g (½ cup) all-purpose flour, unbleached
  • 113 g (4 ounces) chocolate chunks from a bar***
  • About 1 extra ounce of chopped chocolate for decoration (optional but pretty)
  • 57 g (¼ cup) unsalted butter, room temp
  • 1 large (50 g) egg, cold from fridge
  • 11 g (2 tablespoons) black cocoa*
  • 6 g ( 1 tablespoon) Dutch-processed cocoa
  • 53 g (¼ cup) brown sugar
  • 50 g (¼ cup) white sugar
  • ½ teaspoon kosher salt
  • ¼ + ⅛ teaspoon cream of tartar**
  • 1 teaspoon vanilla extract
  • 60 g (½ cup) all-purpose flour, unbleached
  • 113 g (4 ounces) chocolate chunks from a bar***
  • About 1 extra ounce of chopped chocolate for decoration (optional but pretty)
  1. Prep the ovens, pans, and chocolate.
    Ensure you have a rack in the center of your oven and preheat it to 375 °F (190 °C). Line cookie sheets with parchment paper or silicone baking mats.

    Chop your chocolate bar into approximately ¼ inch (½ cm) pieces. 
  1. Make the cocoa powder-butter mixture.
    In a large mixing bowl, add the butter, cold egg, cocoa powders, sugars, salt, and cream of tartar. Mix on medium-high speed until fully combined.

    Continue to mix on medium speed for about 2-3 minutes to thicken the mixture and evenly distribute the cream of tartar to neutralize the black cocoa. (Don’t skimp on the time here, this reduces bitterness and the cookie's spread while baking.)

  2. Stir in the vanilla extract, flour, and chocolate.
    With a spatula, slowly mix in the vanilla extract, then the flour, and last, the 4 ounces of chopped chocolate pieces.
  1. Bake for 9-11 minutes.
    Use a #30 cookie scoop (a little underfilled) or a spoon to scoop 1 ¾ tablespoon balls of dough onto your prepared cookie sheet about 2 inches apart. I like to do about 8 cookies per sheet.

    It’s hard to see when chocolate cookies are done baking, so use shape as an assessment for doneness. At the beginning of the baking process, these cookies will pool out into a thin batter, leaving most of the lumps of chocolate in the middle. Near the quarter-end of baking, the pooled batter will start to puff up. They are done when the cookie is evenly and thinly puffed, but the center may be just a smidge wet-looking. They will be irregular in shape and have tiny air bubbles along the surface. 
  2. Allow the cookies to cool on the pan.
    These cookies are super soft out of the oven, so let them sit on the hot pan for about 5 minutes before attempting to move them onto a cooling rack.

    While they are still warm, use a circular object, such as a large circle cookie cutter, bowl turned upside down, or lid of a jar, and slide each cookie around on the hot cookie sheet to get a more circular shape. It’s optional, but it makes your cookies look more polished.

    Take the extra chocolate set aside to decorate the tops of the cookies. Sprinkle on a bit of large, flaky salt if you wish. 

    When they cool completely, they are soft and wonderfully fudgy, and if you keep them in an airtight container, they stay that way for about 2 to 3 days after baking.

Recipe Card - Adriana's Notes

*Black cocoa powder is a processed form of natural cocoa powder with a deep, dark color and a rich, intense flavor, often with a slightly bitter and earthy undertone. It’s sometimes hard to source in stores, so I buy mine online. For these cookies, I prefer (in this order) King Arthur Flour Black Cocoa, Cacao Barry Noir Intense, Magic Mountain Black Cocoa, and Cocoa Trader black.

**Cream of tartar is an acidic white powder found in the spice aisle. It reduces the cookie's spread and neutralizes the bitter, alkaline flavors of black cocoa. 

***You can use any type of chocolate here, and I prefer dark chocolates with this cookie. White chocolate would be a good choice too for color, textural, and sweetness contrast, but I have yet to try it.

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Black Cocoa Brownies

Yield
one dozen 3 inch (7.6 cm) cookies
Prep time
15 mins
Cook time
9-11 mins per tray
Total time
about 45 mins

Ingredients

  • 57 g (¼ cup) unsalted butter, room temp
  • 1 large (50 g) egg, cold from fridge
  • 11 g (2 tablespoons) black cocoa*
  • 6 g ( 1 tablespoon) Dutch-processed cocoa
  • 53 g (¼ cup) brown sugar
  • 50 g (¼ cup) white sugar
  • ½ teaspoon kosher salt
  • ¼ + ⅛ teaspoon cream of tartar**
  • 1 teaspoon vanilla extract
  • 60 g (½ cup) all-purpose flour, unbleached
  • 113 g (4 ounces) chocolate chunks from a bar***
  • About 1 extra ounce of chopped chocolate for decoration (optional but pretty)

Instructions

  1. Prep the ovens, pans, and chocolate.
    Ensure you have a rack in the center of your oven and preheat it to 375 °F (190 °C). Line cookie sheets with parchment paper or silicone baking mats.

    Chop your chocolate bar into approximately ¼ inch (½ cm) pieces. 
  1. Make the cocoa powder-butter mixture.
    In a large mixing bowl, add the butter, cold egg, cocoa powders, sugars, salt, and cream of tartar. Mix on medium-high speed until fully combined.

    Continue to mix on medium speed for about 2-3 minutes to thicken the mixture and evenly distribute the cream of tartar to neutralize the black cocoa. (Don’t skimp on the time here, this reduces bitterness and the cookie's spread while baking.)

  2. Stir in the vanilla extract, flour, and chocolate.
    With a spatula, slowly mix in the vanilla extract, then the flour, and last, the 4 ounces of chopped chocolate pieces.
  1. Bake for 9-11 minutes.
    Use a #30 cookie scoop (a little underfilled) or a spoon to scoop 1 ¾ tablespoon balls of dough onto your prepared cookie sheet about 2 inches apart. I like to do about 8 cookies per sheet.

    It’s hard to see when chocolate cookies are done baking, so use shape as an assessment for doneness. At the beginning of the baking process, these cookies will pool out into a thin batter, leaving most of the lumps of chocolate in the middle. Near the quarter-end of baking, the pooled batter will start to puff up. They are done when the cookie is evenly and thinly puffed, but the center may be just a smidge wet-looking. They will be irregular in shape and have tiny air bubbles along the surface. 
  2. Allow the cookies to cool on the pan.
    These cookies are super soft out of the oven, so let them sit on the hot pan for about 5 minutes before attempting to move them onto a cooling rack.

    While they are still warm, use a circular object, such as a large circle cookie cutter, bowl turned upside down, or lid of a jar, and slide each cookie around on the hot cookie sheet to get a more circular shape. It’s optional, but it makes your cookies look more polished.

    Take the extra chocolate set aside to decorate the tops of the cookies. Sprinkle on a bit of large, flaky salt if you wish. 

    When they cool completely, they are soft and wonderfully fudgy, and if you keep them in an airtight container, they stay that way for about 2 to 3 days after baking.