Keto Peanut Butter Muffins

These flourless keto peanut butter muffins are packed with protein to fuel you through your healthy day. An easy recipe that makes a fabulous on-the-go keto breakfast.

Recipe Print

Close up shot of a keto peanut butter muffin broken open to show the inside with chocolate chips.

These flourless keto peanut butter muffins are packed with protein to fuel you through your healthy day. An easy recipe that makes a fabulous on-the-go keto breakfast.

Keto peanut butter muffins on a white platter.

I love keto muffins and I am pretty sure I post a new muffin recipe at least once a month. They’re so easy and ideal for quick healthy breakfasts or keto snacks. And they freeze like a dream.

I also love experimenting with keto ingredients and finding new ways to do things. So these keto peanut butter muffins are entirely flourless. No almond flour, coconut flour, or peanut flour at all.

Instead, I made them with collagen protein powder. And my husband declared that they were some of the best keto muffins I’d ever made! Crazy, right? But it works!

Three keto peanut butter muffins in blue liners on a white platter, in front of a vase with flowers and another plate of muffins.

Baking with collagen

In most instances, I don’t recommend using collagen protein in keto baking. I usually use whey protein or egg white protein in keto cakes and muffins because it provides a lighter, fluffier consistency.

I have found that, when baking with almond flour, collagen usually makes the baked goods gummy and hard to cook through.

It makes sense when you think about it. Collagen is one of the building blocks of the human body, and of all animal bodies. It’s in our skin, hair, joints, and connective tissues, and it provides structure, elasticity, and moisture.

In the same manner, collagen protein powder (aka collagen peptides) tends to hold on to moisture, so it can keep muffins and cakes from baking properly.

But I used it very differently in these keto peanut butter muffins. I skipped the flours altogether, didn’t add any additional liquids, and used collagen and peanut butter for structure.

And I was delighted with the results!

Collagen peptides vs. hydrolyzed collagen

So what’s the difference between collagen peptides, hydrolyzed collagen, and collagen powder? If you’re confused by all these different terms, you’re not alone!

Every brand and recipe refers to collagen in various ways, but the truth is that it’s all one and the same. They all contain collagen that has undergone hydrolysis, in order to break the bigger amino acid chains into a more digestible form.

Okay but with so many brands of collagen out there, which ones do you choose?

All I can tell you is that I love Perfect Keto. It’s a little pricier than some but it has incredibly clean ingredients from grassfed animals. It also has some delicious flavoured varieties and I can’t get enough of the salted caramel.

For 20% of all Perfect Keto products, use ALLDAYIDREAM20

(I am an affiliate and make a small commission on each sale but I truly love their collagen!)

Three keto peanut butter muffins in blue liners on a white plate.

How to make keto peanut butter muffins

These muffins are delicious and easy to make. Here are my best tips for getting it right:

Line the muffin pan: I always recommend silicone or parchment liners, as keto baked goods can stick more than the conventional kind.
Melt the peanut butter: You want it to be easy to whisk in with the other ingredients so it needs to be almost liquid before you proceed.
Whisk in the sweetener: Break up any clumps in the sweetener and try to get it well dissolved into the peanut butter. Then add the eggs and vanilla.
Stir in the dry ingredients: Add the collagen, baking powder, and a bit of salt and whisk until well combined. The batter should be somewhat on the thin side but will thicken up as it sits.
Stir in the chocolate chips: I always like to save a few chips for the top of each muffin.
Bake until golden: The best way to test doneness in keto muffins is the touch test. Simply touch the top of one muffin and if it feels firm, it’s done. Don’t over-bake.

Frequently Asked Questions

This is an unusual keto muffin recipe so I know there will be a lot of questions. I will do my best to answer them here!

Can I make these with a different kind of protein powder?

Other protein powders work very differently than collagen. I once tried egg white protein in a muffin like this and they were very dry. So I really can’t guarantee this recipe with a different kind of protein powder.

If you do try, I recommend adding some additional coconut oil or butter (about 1/4 cup) and adding more liquid if necessary. Make sure you don’t over-bake them.

I am allergic to peanuts, can I use almond butter?

Yes, any nut butter should work well. If it has a lot of separated oil, make sure to mix it in well before proceeding.

What about using flavoured collagen powder?

That could be absolutely delicious. The salted caramel or peanut butter flavors from Perfect Keto would be great in these muffins. Do keep in mind that flavoured collagen usually contains sweetener so you may want to cut back on the added sweetener.

Can I use a different sweetener?

To be frank, I am not entirely sure, as I haven’t yet experimented using collagen and other sweeteners. Any erythritol based sweetener should be fine but I can’t be sure how allulose or BochaSweet will affect the results.

If you try, please be sure to come back and tell me how it goes!

Close up shot of a flourless keto peanut butter muffin on a white plate with a cup of coffee.

Storage information

Store these keto peanut butter muffins on the counter in an airtight container for up to four days, or in the fridge for a week.

They can also be frozen for several months.

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