Eric’s Favorite (Chocolate and Peanut Butter Marble Cookies)

There’s a reason these chocolate peanut butter marble cookies are a staple in my house. My boyfriend, Eric, LOVES them. They essentially were made for him. Like literally, I made this recipe because he can’t get enough of Ben & Jerry’s Tonight Dough, and these cookies felt like the next best thing.

They are a hybrid of a brownie cookie and a peanut butter cookie, with tons of chocolate chips interlaced. Of course they contain brown butter (I don’t think I can go back after my discovery) and they are big, somewhat soft and definitely chewy.

These cookies are a love letter, and I hope you love them as much as Eric does. But believe me, he’ll always have dibs.

Ingredients for this chocolate peanut butter marble cookie

The ingredients mirror each other for each cookie “side,” but there are a few slight tweaks to each recipe. Here is everything you’ll need for these marble cookies:

For both:

• 113 grams 70% cocoa chocolate chopped
• 226 grams/1 cup butter

For the brownie cookie:

• 118 grams brown sugar ½ cup & 2 tbsp spooned and packed
• 1 tbsp milk of choice
• 1 large egg at room temperature
• 50 grams white sugar 1/4 cup
• 175 grams flour 1 & 1/3 cup
• 2 tbsp dutch process cocoa
• 1 ½ tsp baking powder
• 1/4 tsp salt

For the peanut butter cookie:

• 1 tbsp milk of choice
• 118 grams brown sugar ½ cup & 2 tbsp, spooned and packed,
• 1 large egg at room temperature
• 75 grams creamy peanut butter 1/3 cup
• 50 grams white sugar 1/4 cup
• 183 grams flour 1 & 1/3 cup and 1 tbsp
• 1 ½ tsp baking powder
• 1/4 tsp salt

How to make the brown butter

When you brown butter, you are essentially toasting the milk solids until they darken and deepen in color, lending rich caramelization flavor in a cookie.

To brown the butter, it’s best to put a skillet or saucepan on medium-low heat, and melt the butter until it is golden yellow. Stir constantly to prevent the butter from scorching.
Continue to cook down the butter until the mixture starts to fizz slightly. Stir constantly as the butter begins to brown. When it gets to a golden brown color, remove from the heat and keep stirring until you get a rich dark brown color. Pour this into a large bowl.

Then you’re ready for the next step!

How to temper your brown butter

The next step is tempering the brown butter. You do this before adding the egg to ensure that the egg doesn’t curdle. This would only happen if the butter was still hot, so we add milk for extra richness in the recipe, as well as a way to bring the heat down in the brown butter.

To temper the butter in this recipe, first divide the butter evenly into two large bowls. Add 1 tbsp of milk in each bowl and whisk together until the butter is a light golden color.

If the mixture feels around room temperature, then it’s time for the sugar and the egg.

Splitting up the doughs into two bowls

I mentioned this briefly above, but we started by browning one large amount of butter, and for the rest of the recipe we will be working in two bowls.

Since butter loses moisture as it browns, you’ll have less butter than when you first started. So each bowl will get about 100 grams of butter in it.

After the butter is split up and tempered, add the sugars to both bowls, but then add the peanut butter to just one bowl.

How to make the brownie cookie dough

For the brownie cookie dough, you’ll want to add Dutch process cocoa powder along with the dry ingredients.

Dutch process cocoa has a much darker and richer flavor than baker’s cocoa or even cacao. This ingredient is integral to getting that rich, brownie-like taste but with only 2 tbsp of cocoa. So don’t skip it!

How to make the peanut butter cookie dough

The peanut butter cookie dough is simple. Just add the peanut butter to the wet ingredients, mix well, and add in the rest of the dry.

The peanut flavor is subtle but there, and the color and richness is perfect in the cookie.

How to make these chocolate peanut butter marble cookies

Here’s a full (and DETAILED oop) step-by-step of how to make these cookies and mold them together!

• Add the 1 cup of butter (2 sticks) to a saucepan. Put the saucepan on low heat and melt the butter fully. Raise the heat to medium and stir constantly. Let the butter foam slightly. When it turns a rich brown color remove it from the heat and whisk until the butter turns dark brown.
• Divide the butter evenly into two large bowls. Since moisture has cooked off during the browning process, each bowl should contain about 100 grams of butter.
• Add 1 tbsp of milk to each bowl and whisk to temper the butter. Let it cool for a few more minutes.
• Whisk one egg into each bowl. Then add the sugars and whisk again.
• For the chocolate batter, add in the flour, cocoa powder, baking powder and salt to one bowl. Stir to combine.
• For the peanut butter, whisk in the peanut butter to the second bowl, then add the flour, baking powder and salt. Stir to combine.
• Split the chocolate chips evenly between the cookies.
• Use a 3 tbsp scoop to scoop out a portion of each dough. Roll the dough together to create 10 large “marble” balls.
• Place the cookie dough balls on a parchment lined baking sheet and chill in the refrigerator while you preheat the oven to 350F.
• Bake for 10-12 minutes at 350F. The key is to remove the cookies before they look fully done. They will continue to “cook” outside of the oven, so this method helps them maintain the chewy texture.
• Let cool and serve!

How to cool and store these chocolate peanut butter marble cookies

A key, KEY trick to these cookies is how you cool them. Or don’t cool them, in that regard.

I always recommend taking cookies out of the oven before they look fully “done.” This is because these chocolate peanut butter marble cookies continue to cook from residual heat when they are out of the oven, so pulling them out early ensures they stay moist and chewy in the center.

From there, you can either store them in the fridge right away, or on the counter. In both circumstances I recommend using an air-tight container and keeping the cookies in a dry place.

FAQ

Looking for other cookie recipes?

You’ve come to the right place. Here are a few other popular favorites from the blog!

Burnt Miso (Brown Butter) Dark Chocolate Chip Cookies

The name says it all, but it still doesn't do this recipe justice. These chocolate chip cookies are filled with rich brown butter flavor, umami miso saltiness and rich dark chocolate. It's like heaven in a bite (or five).

Check out this recipe

Blue(berry) Cookies | Vegan & Naturally Blue!

I can confidently say these will be the best (and maybe only?) blueberry cookies you've ever had! They are soft in the middle, crispy on the edges, and are filled with melt-in-you-mouth goodness. This recipe uses frozen blueberries to make the cookies naturally blue, but that's not all they do! They help make this cookie recipe vegan, sweet and filled with blueberry flavor. A total winner in my books!

Vegan Levain Chocolate Chip Cookies

The thicc bois have entered the group chat. This vegan cookie recipe only makes 6 but they are SO worth it. Full credit for their ~chonkiness~ goes to one of the most underrated fat sources: vegetable shortening! It creates a thicker, taller cookie while still keeping moisture and tenderness, a total win-win for anyone plant-based!

Check out this recipe

And that’s it for this chocolate peanut butter marble cookie recipe!

If you make it, please tag me on Pinterest or Instagram so I can see! It’s my favorite thing to scroll through stories and see what you all are making.

And of course feel free to leave any questions, comments or reviews! This is the best place to reach me, and I’d love to hear from you <3

Eric’s Favorite (Chocolate and Peanut Butter Marble Cookies)

These cookies have it all – brown butter, a dark chocolate side, a peanut butter side…oh and not to mention, they are HUGE. They taste like a brownie and a peanut butter cookie rolled in one. Soft in the middle, chew edges. There's a reason they are Eric's favorite.

Print Recipe Pin Recipe

Prep Time:15 mins

Cook Time:15 mins

Course: Dessert, Snack

Cuisine: American

Keyword: chocolate, chocolate chip cookies, cookies, peanut butter

Servings: 10 cookies

Ingredients

• 226 grams/1 cup butter

For the brownie cookie:

• 118 grams brown sugar ½ cup & 2 tbsp spooned and packed
• 1 tbsp milk of choice
• 1 large egg at room temperature
• 50 grams white sugar 1/4 cup
• 175 grams flour 1 & 1/3 cup
• 2 tbsp dutch process cocoa
• 1 ½ tsp baking powder
• 1/4 tsp salt

For the peanut butter cookie:

• 1 tbsp milk of choice
• 118 grams brown sugar ½ cup & 2 tbsp, spooned and packed,
• 1 large egg at room temperature
• 75 grams creamy peanut butter 1/3 cup
• 50 grams white sugar 1/4 cup
• 183 grams flour 1 & 1/3 cup and 1 tbsp
• 1 ½ tsp baking powder
• 1/4 tsp salt

For both:

• 113 grams 70% cocoa chocolate chopped

Instructions

• Add the 1 cup of butter (2 sticks) to a saucepan. Put the saucepan on low heat and melt the butter fully. Raise the heat to medium and stir constantly. Let the butter foam slightly. When it turns a rich brown color remove it from the heat and whisk until the butter turns dark brown.
• Divide the butter evenly into two large bowls. Since moisture has cooked off during the browning process, each bowl should contain about 100 grams of butter.
• Add 1 tbsp of milk to each bowl and whisk to temper the butter. Let it cool for a few more minutes.
• Whisk one egg into each bowl. Then add the sugars and whisk again.
• For the chocolate batter, add in the flour, cocoa powder, baking powder and salt to one bowl. Stir to combine.
• For the peanut butter, whisk in the peanut butter to the second bowl, then add the flour, baking powder and salt. Stir to combine.
• Split the chocolate chips evenly between the cookies.
• Use a 3 tbsp scoop to scoop out a portion of each dough. Roll the dough together to create 10 large "marble" balls.
• Place the cookie dough balls on a parchment lined baking sheet and chill in the refrigerator while you preheat the oven to 350F.
• Bake for 10-12 minutes at 350F. The key is to remove the cookies before they look fully done. They will continue to "cook" outside of the oven, so this method helps them maintain the chewy texture.
• Let cool and serve!