A chewy peanut butter cookie studded with plenty of peanut butter M&M’s and baked in a skillet. This peanut butter M&M skillet cookie is just waiting for you to take a slice!

Cast iron skillet filled with peanut butter cookie with M&Ms on top.

Chewy peanut butter M&M cookies are always a welcome treat at our house. Baking them into a big skillet cookie makes the process even easier and gives you lots of the best chewy center parts. 

It is peanut butter and chocolate cookie goodness at its finest!

This post was originally from 2015.  I thought it was high time to make this bad boy again.

When I pulled up the post, the pictures of Little Dude melted my heart.  He was always been such a helper.  

I couldn’t bare to take those pictures out. He is just too dang sweet. But I did update the pictures of the cookie itself.

Mixing bowl full of peanut butter cookie dough and peanut butter m&ms.

I will let you read the original post and see the fun pictures of little dude from when he was an itty bitty sous chef.  

I don’t know if you guys know this or not, but I have a sweet tooth.  I thought I might go ahead and fess up to it!  

I also love all things chocolate and peanut butter.  I mean, that does go without saying right?  So I just couldn’t help myself when I saw a bag of peanut butter M&Ms on sale at the store.  

little dude stirring melted butter and peanut butter in a glass mixing bowl.

 I had been wanting to make some cookies, but sometimes cookies take too long!  You have to wait for the butter to come to room temperature, make the dough, put it back in the fridge to firm up, scoop the cookies, bake the cookies.  

 I am a little impatient sometimes (keep your comments to yourself, MiMi!) so I need to have a shortcut.

little dude pressing cookie dough into cast iron skillet.

A skillet cookie solves some of the time issues.  You can use melted butter and can bake it right away because you don’t have to worry about the cookies spreading too far.  

Plus it just takes one trip to the oven, no worry about doing a sheet at a time! 

Little dude pouring extra m&ms on top of skillet cookie.

The melted butter also made it much easier for Little Dude to stir as well.  So it was win, win.

He has so much fun helping in the kitchen.  For this project he got to crack the eggs, dump the ingredients in the bowl, and stir them up.

He also enjoyed pushing the dough  into the skillet and spreading it around.  But his favorite part was putting some more M&M’s on top.  

Our cookie might have been missing an M&M or two, but it was still delicious. 

Peanut butter cookie dough pressed into cast iron skillet with peanut butter m&ms on top.

The cookie slices best if you wait a while first.  Little Dude and I couldn’t wait, so we had crumbly but delicious first slices.     

My husband and a friend were installing some siding for a couple of friends, so Little Dude and I delivered some pieces to them.  The extra wait time made those pieces come out much better.  

slice of peanut butter m&m skillet cookie on plate.

We also loaded up some pieces in the wagon and walked them over to my brothers’ house.  Our cookie delivery service did not get any complaints!   

This cookie is everything you would want from a skillet cookie.  It is thick and soft in the middle with just a little bit of crunch around the edge.  But don’t take it from, try one yourself!

More Cookie Cake Recipes

If you like thick and chewy cookies, frosted sugar cookie bars are for you. They are so much easier than making and frosting a bunch of individual cookies!

For even more fun and color, make funfetti sugar cookie bars. They are perfect for a party.

Check out my collection of dessert bar recipes for even more tasty inspiration!

Cast iron skillet filled with peanut butter cookie with M&Ms on top.
5 from 9 ratings

Peanut Butter M&M Skillet Cookie

Author: Carlee
Servings: 12 Servings
A chewy peanut butter cookie studded with plenty of peanut butter M&M’s and baked in a skillet. This peanut butter M&M skillet cookie is just waiting for you to take a slice!
Prep: 10 minutes
Cook: 35 minutes
Total: 45 minutes

Equipment

Ingredients 

  • ½ cup butter
  • ½ cup peanut butter
  • ¾ cup light brown sugar packed
  • ½ cup granulated sugar
  • 1 large egg
  • 2 teaspoons vanilla extract
  • 1 teaspoon salt
  • 3 Tablespoons milk powder optional
  • ½ teaspoon baking powder
  • ¼ teaspoon baking soda
  • cup all-purpose flour
  • 1 bag peanut butter M&M’s

Instructions 

  • Preheat oven to 350°F
  • Melt butter in mixing bowl, then stir in peanut butter.
    ½ cup butter, ½ cup peanut butter
  • Mix in brown sugar and sugar and stir well.
    ¾ cup light brown sugar, ½ cup granulated sugar
  • Add in egg and vanilla and stir until completely uniform.
    1 large egg, 2 teaspoons vanilla extract
  • Stir in the salt, milk powder, baking powder and baking soda until really well mixed.
    1 teaspoon salt, 3 Tablespoons milk powder, ½ teaspoon baking powder, ¼ teaspoon baking soda
  • Stir in flour until just combined. Fold in most of the M&M’s, reserving some to place on top.
    1¾ cup all-purpose flour, 1 bag peanut butter M&M’s
  • Press into a 8 inch skillet or cake pan. Arrange remaining candies on the top of the cookie.
  • Bake for 30-35 minutes.
  • (This is the hardest part!) Wait for at least 45 minutes before cutting and serving. If you jump the gun, it will still taste great but will not hold its shape.

Notes

You can replace up to 3/4 cup of the flour with white whole wheat flour.
Why the milk powder? Milk powder adds protein and flavor to the cookie dough, making the resulting cookies a little chewier and adding depth of flavor. You can leave it out if you don’t have any.

Nutrition Information

Serving: 1Serving | Calories: 300kcal | Carbohydrates: 38g | Protein: 6g | Fat: 15g | Saturated Fat: 7g | Polyunsaturated Fat: 6g | Cholesterol: 36mg | Sodium: 355mg | Fiber: 2g | Sugar: 22g
“Cooking With Carlee” is not a dietitian or nutritionist, and any nutritional information shared is an estimate. If calorie count and other nutritional values are important to you, we recommend running the ingredients through whichever online nutritional calculator you prefer. Calories and other nutritional values can vary quite a bit depending on which brands were used.

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5 from 9 votes (6 ratings without comment)

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39 Comments

  1. Sue from Sizzling Towards 60 & Beyond says:

    Looks great for an afternoon tea treat and I love your sous chef!

    1. I have the best sous chef around!

  2. Okay, it's decided. I need to buy a cast iron skillet. This looks delicious. I hate waiting for the whole process with cookies too. This sounds perfect!

    And your little helper is adorable!

    1. You definitely need one! I use my cast iron skillets for all sorts of fun things! Thank you so much!

  3. This looks delicious!!! I have a sweet tooth too and this is exactly what I go for when I'm craving something sweet.

    1. Thank you! This is one of my favorite kind of treats as well!

  4. What a good idea, it looks delicious and I just love your little helper.
    We love you sharing on Fridays Blog Booster Party #22
    Kathleen

    1. Thank you so much! He is definitely a keeper!

  5. Anonymous says:

    Oh my! Looks yummy and fun to bake 🙂 I'm adding it to my 'try list'!

    Keep smiling 🙂
    Claire
    x

  6. Emma @ Our Whimsical Days says:

    Oh, wow! Those look delicious! How fun that you got to make it together!

    1. We love to cook together!

  7. I should set the same rule for myself! LD is a very good helper, we have the best time together!

  8. 5 stars
    1.. xoxoxoxoooooo. Those pictures of Little Dude helping are priceless. I can tell he is working very hard to be a good helper.
    2. Peanut Butter M&M's are my favorite. This looks like the perfect good. (Whole grains, peanuts and chocolate are good for you). I need to remember to stir in a few chocolate chips when I make this. (For the health of it 😏)
    3. Let me know when a home is for sale in your neighborhood. I want in on this special cookie delivery service. More to see you and LD than the cookies, but I would take them off your hands.
    4. I would never pass judgment on someone's lack of patience. Have you met me? Hello. This is why I love the Texas style sheet cakes and Bundt cakes.
    5. I wonder if you melt the butter in the cast iron skillet and kept it hot (like I do for skillet cornbread) if it would make a crispy and buttery crust? Just think. Undercooked just a tad so we have a gooey center and crisp edge. Oh my goodness. GENIUS

    1. You should definitely move to the neighborhood. We deliver cookies within a one wagon pull's distance!

  9. Jessica Cross says:

    These looks so good! I love those peanut butter m&m's. Actually, we love anything peanut butter 🙂 Your son looks so cute helping. I love when kids get in the kitchen! I think I may need to invest in a skillet pan after seeing this.

    1. You really should! I love my skillet for all different kinds of things. I think our mutual love of peanut butter could get us both in trouble 😉

  10. Brita Long says:

    That looks amazing! Pinned for reference. 🙂

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