Rich chocolate muffins studded with semisweet chocolate chips and filled with a peanut butter cream cheese filling.
Is it a muffin, or is it a cupcake?
I wrestled with this question for far too long, particularly while photographing these rich, chocolate beauties with their peanut butter surprises peeking out from soft edges and from beneath still-molten chocolate chips. They’re sweet, they’re chocolaty, and I definitely would not be disappointed to be offered one of these to satiate my sweet tooth after a meal. Signs started to lean toward cupcake, and even my family members referred to them as such.
But ultimately, I decided that what really makes a cupcake a cupcake (at least in my head) is a sweet, sugary crowning of frosting. Meticulously swirled or carelessly slabbed on top with an ill-wielded butter knife or icing spatula, it’s frosting that makes a cupcake a cupcake, and these have none.
So, muffins they are. They lose nothing for lack of a frosting, though, and hold their own proudly with a sweet cream cheese and peanut butter based filling that offers a peanut butter-thick contrast to the soft chocolate crumb of the cupcake in each bite. They’re not too sweet as to make your teeth hurt, but they’re sweet enough that a glass of milk would go wonderfully alongside one (or so I hear, I actually don’t drink milk myself).
Also, if you call these muffins, it’s suddenly far more acceptable to devour one or two for breakfast (2 muffins for breakfast sounds much better than admitting to having eaten 2 cupcakes, right?).
They remind me a bit of Reese’s cups for obvious reasons, but with a much softer, fluffier chocolate “shell”.
I hope everyone has a wonderful weekend; I’m starting another vacation day with a muffin for breakfast, and spending it by surely making a mess in the kitchen while trying to keep that (loathsome) pile of dishes as small as possible (wish me luck on that!).

Peanut Butter Filled Chocolate Muffins
Ingredients
Peanut Butter Filling
- 8 oz cream cheese softened
- 1/2 cup peanut butter
- 1/2 cup granulated sugar
- 1 large egg lightly beaten
- 1/2 tsp vanilla
Muffins
- 1/2 cup canola oil vegetable oil would also work
- 1 cup granulated sugar
- 1/2 cup milk
- 2 large eggs lightly beaten
- 1 tsp vanilla extract
- 2 cups all-purpose flour
- 1/2 cup cocoa powder
- 1 1/2 tsp baking soda
- 1/2 tsp salt
- 2/3 cup sour cream
- 2 cups semisweet chocolate chips divided
Instructions
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Preheat oven to 350F and line 18 muffin cups with cupcake liners (or lightly grease and flour).
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Prepare Peanut Butter Filling first by microwaving cream cheese and peanut butter at 10 second intervals until it is easily stirred and combine.
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Stir in granulated sugar, egg, and vanilla. Set aside.
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In large bowl, whisk together oil, sugar, and milk. Stir in eggs and vanilla until well-combined.
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Gently fold in sour cream until just-combined.
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In separate, medium-sized bowl, whisk together flour, cocoa powder, baking soda, and salt.
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Fold flour mixture gently into wet mixture, folding until just barely combined. Stir in 1 1/2 cup chocolate chips.
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Scoop chocolate muffin batter into prepared muffin tin, filling only 1/2 full.
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Scoop heaping spoonfuls (I used a heaping 1 1/2" cookie dough scoop) peanut butter mixture on top of the chocolate batter, then cover with a layer of chocolate batter so that muffin cup is filled 3/4 to 4/3 of the way full.
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Repeat until all batter has been dispersed.
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Sprinkle tops of muffins with remaining chocolate chips.
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Bake on 350F for 22-25 minutes (toothpick inserted in center should come out mostly clean, with a few crumbs.
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Peanut Butter Chocolate Chip Muffins
Blueberry Cream Cheese Muffins
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I guess great minds think alike, its a peanut butter day for me too. Pinned.
Awesome! Thanks, Katalina! 🙂
These look fantastic! Do you have a certain peanut butter that you would suggest?
Thanks Anna! I wouldn’t recommend using a natural peanut butter but any other creamy peanut butter would work. I happened to use Jif for these, but I’ve also made them using just the generic grocery store brand and those turned out great, too!
Oh, chocolate muffins with peanut butter!! This sounds awesome, Sam! 🙂
Thanks so much, Sina!! 🙂
I agree, they’re muffins!
Glad you agree, Patty! 🙂
Yum yum yum! Usually we see peanut butter muffins with chocolate chips but these are next level because they have the chocolate chips, the chocolate muffin, AND a pb core 🙂 Love it- pinning!
Thank you, Medha! Glad you like them 🙂
Yes, they are muffins! and totally acceptable to eat for breakfast! In fact, I wish I had eaten breakfast before I clicked on this recipe LOL because now…this is what I want! Definitely pinning for later! Thanks for sharing Sam!
Glad you agree, Amber! Thanks so much! 🙂
These are unlike any muffins I’ve eaten before. That’s the perfect excuse to whip out my muffin pan and make these, lol. Also your pictures look gorgeous. 🙂
Thanks so much, I’m so glad you like them! 🙂
Oh my goodness Sam these look amazing! What a great idea! That filling looks so sweet and the perfect balance for the muffin/cupcake!
Thank you, Shelby! 🙂
Sam these look amazing! I love muffin and cupcakes, so these are calling my name. Awesome combo of chocolate and peanut butter! Have a wonderful long weekend! 🙂
Thank you, Ana!! You have a wonderful weekend, too!
These muffins look specially made for me – chocolate and peanut butter! I wanna grab one from my screen!
Thank you, Marsha! Glad you like them! 🙂
Disagree. They might be not technically the cupcakes, but they’re much better than just muffins. Kind of almost Cupcakes. Or Cupcakes from the inside. Or reverse Cupcakes. But who cares about that technical part of this question, right? The only thing that matters, they’re super scrumptious. Good job, Sam!
Thanks so much, Ben! I’m glad you like them! 🙂
Oh my goodness…I am crying at how good these look. You always have me drooling when I visit your page!!
Haha, thanks so much, Annie!! 🙂
Ahh, these look so delish! Peanut butter and chocolate are one of my favorite flavor combos! I don’t care if they’re a muffin or cupcake, I just want one in my belly, haha! Must try this ASAP! Thanks, Sam!
Thank you so much, Joscelyn! 🙂
Full confession…I don’t like peanut butter. However, I do make peanut butter treats for my kids and my hubby. I just won’t like the bowl or try a bite. I guess I’ll just have to get pleasure from watching them!
It’s always so surprising to me when people don’t like peanut butter because I’m borderline obsessed! To each their own, though! Thanks for stopping by, Kathy! 🙂
Yep yep, I think you made the right choice between muffin and cupcake. These look SO good. I think I know a certain fiance who might need these for his birthday 🙂 Can’t beat peanut butter and chocolate!
Glad you agree with me, Sarah! Thanks so much! 🙂
OH YUMM! These look incredibly delish, Sam. Chocolate muffins with peanut butter sounds like best combination ever! YUM!
Thanks so much, Anu!
Oh, my good lord. I love anything stuffed with PB. These muffins are probably my holy grail of muffinhood. Amazing, Sam!
Haha, thank you, Mir! I’m glad you like them!
Love chocolate and peanut butter and these muffins look gorgeous! Pinning!
Thanks so much, Mira! 🙂
WOW!! These look so incredible, Sam!! I am such a peanut butter fan, and the fact that you’ve got this little hidden surprise of PB in this deliciously fluffy, moist chocolate muffin is perfection. No one will be missing any frosting with these beauties <3
Thanks so much, Beeta! I thought they were perfect without frosting, too! 🙂
I made these muffins the other day and they were absolutely delicious! I don’t normally like peanut butter but even I liked them in these muffins. I sent them in with my fiance to work and everyone was very pleased. Awesome post!
That’s awesome, Shelby!!! I’m glad you and your fiancé (and his coworkers!) liked them, thank you so much for letting me know how they turned out 🙂
I made these for my grandchildren last week and they were a hit!! Now they are asking me to make the double chocolate muffins but put marshmallow cream in the middle instead of peanut butter. ??. Do you think that would work? And would I still use the egg in the filling??
Jackie I’m so glad to hear that you & your grandchildren enjoyed the muffins! As for the marshmallow cream, I’m not entirely sure how that would work, unfortunately. Marshmallow can be funny to bake with and can harden, it might be better to add it after the muffins are baked (like perhaps cut a small hole in the top down to the center and pipe the filling in). I’m sorry I’m not more certain about how it would work to bake with the marshmallow cream!