A big single serve Copycat Levain Bakery Protein Cookie made healthy with oat flour, protein powder and no sugar or butter. This homemade Levain inspired cookie recipe is gluten free, sugar free and Vegan too!

Okay I’m gonna be honest here, I haven’t had that original thick Levain Bakery cookie from New York. I actually really want to though; So this was my homemade Levain cookie to satisfy those cravings from everything I saw online.

I looked up the classic Levain cookie and some recipes online and turns out the best one is the chocolate chip walnut. That’s what I went for here.

A thick loaded chocolate chip and walnut protein cookie like the one from the bakery, but actually healthy and sugar free and what not.

Ingredients for Copycat Levain Bakery Protein Cookie Recipe

This healthy Levain protein cookie recipe has just a few simple ingredients, is eggless, has no butter or oil and no sugar either!

Oat Flour – You can make your own by blending rolled oats in a high speed blender
Protein Powder for high protein cookie recipe, and also replace the sweetener.
I recommend the ProteinWorld Slender Blend or Whey Protein Powder for this recipe to keep it sugar free; Use the code HAYLSKITCHEN for a discount.
Another option is Quest Vanilla.
Unflavored Collagen I use the one from Further Foods (HAYLSKITCHEN gives you a Peanut Butter Powder, also known as Powdered Peanut Butter. I recommend Lakanto for a sugar free version (the code HAYLSKITCHEN gives you a discount). Or you could use the one from PbFit too.
1:1 Zero Calorie Sugar Substitute – I use Lakanto, to keep this recipe sugar free; (code HAYLSKITCHEN for a discount here too)
Non-fat Greek Yogurt contributes to the oil-free part of this levain protein cookies since it adds the moisture, and also extra protein
Almond Milk to keep it dairy free.
Baking Powder

If your protein powder is not sweet enough, you might need some more ‘sugar’, or use stevia sweetener instead.

And for the classic Levain cookie mix-ins:

Sugar free Chocolate Chips to make this homemade Levain cookie with no added sugar. I use the ones from Lakanto here (HAYLSKITCHEN for a discount here too). Another option is Lily’s Chocolate Chips.
Chopped Walnuts

How to you make a Single Serve Levain Protein Cookie

To make one of these Levain protein powder cookies, you mix the protein cookie dough, cool, spread on baking sheet and just bake!

Preheat your oven to 0°F and line a baking pan with parchment paper.

Mix your ingredients – oat flour, protein powder, collagen powder, peanut butter powder, zero calorie sweetener, Greek yogurt, almond milk and baking powder – in a bowl.

Add in chopped walnuts and chocolate chips, and mix to form the homemade levain cookie dough.

Cover bowl with plastic wrap and place in fridge for 45-60 minutes to cool.

Transfer Levain protein cookie dough onto the baking sheet in a large cookie-shaped clump.

Bake for 10 min; Top should be slightly golden brown

Let it cool a bit, and indulge in this big Levain bakery inspired protein powder cookie!

Tips for Single Serving Homemade Levain Bakery Cookie

Make sure the milk and yogurt are at room temperature to prevent the nut butter from clumping.
Let cookie dough cool! The dough will otherwise spread too much when baking and not give you the soft inside when done.
Don’t over-bake the cookie; Let cook until the top is just cooked and soft; too long and you might end up with a rough and dry texture.

Alternates for a Healthy Levain Cookie Recipe

I recommend making this Levain inspired giant protein powder cookie using the ingredients and products listed – especially the since it gives the best results.

If you need other options for the flours and such, here’s some alternatives:

Oat flour: Whole wheat pastry flour, all purpose flour or 1:1 Gluten-free baking flour in the same amount by weight.
You can try to use almond flour; I’m a little hesitant about this one, so let me know if you try it.
Protein Powder: More 1:1 Zero Calorie Monkfruit sweetener to keep it sugar free
Unflavored Collagen: unflavored protein powder or more flour
Peanut Butter Powder: Creamy Peanut Butter, but reduce the amount of milk
1:1 Zero Calorie Sugar Replacement: Regular confectioners sugar or coconut sugar (this won’t be sugar free though)
Almond Milk: Regular non-dairy milk
Greek Yogurt: Coconut Yogurt

A Vegan Protein Cookie Recipe

This single serve Levain protein powder cookie recipe has no eggs and uses almond milk, so can easily be made Vegan too with the right alternatives.

For the perfect eggless Vegan Levain protein cookie, make sure you use a plant based protein powder, coconut yogurt and dairy free chocolate chips.

ProteinWorld has a Vegan protein blend that would be great here (HAYLSKITCHEN for the discount here too).

More Single Serve Protein Cookie Recipes to Try: