Amazing but Healthy Halloween Cookie Bars made with protein powder for sweetener, and no sugar outside the candy. An easy, tasty and high-protein cookie bar for your leftover halloween candy!

After making that amazing Protein Skillet Cookie recipe, I was just looking for opportunities to use that recipe to make a similar cookie-ish dessert. Saw some halloween candy in my pantry, and these leftover candy cookie bars were perfect.

A soft and chewy protein halloween candy cookie bar that you’re going to want more of!

Ingredients for Healthy Halloween Cookie Bars

These high protein halloween cookie bars are made with a few healthy ingredients (no butter) and some classic – and some healthy – halloween canday.

Vanilla Protein Powder for healthy, sugar free pumpkin cookie
I used Quest Nutrition Vanilla whey-casein since it works best for baking.
Unsweetened Applesauce
Peanut Butter Powder, also known as Powdered Peanut Butter. I use Lakanto for a sugar free version (the code HAYLSKITCHEN gives you a discount here).
PbFit or PB2 are good options too.
Whole Wheat Pastry Flour
Zero Calorie Brown Sugar – This is the Brown Monkfruit 1:1 Sugar Substitute from Lakanto, and keeps this recipe sugar free; (code HAYLSKITCHEN for a discount here)
Coconut Flour
An Egg
An Egg White
Almond Butter; I’d recommend American Dream Nut Butter Cookie Batter Almond Butter; Code HAYLSKITCHEN gives you a discount.
Baking Soda

And for the mix-ins:

Candy Coated Chocolate; I recommend the ones from Lily’s; Regular M&Ms work too.
Peanut Butter Cup Candy; I use high-protein, low carb one from Quest Nutrition, but Reese’s works out as well.
Mini Twix Chocolate Bars
Mini Snickers Bars

Tips for Homemade Halloween Candy Cookie Bars

This Halloween candy cookie recipe is super easy, but heres’ some tips to get it perfect every time.

Use whey-casein protein powder since it works well with the ratio of ingredients here; Whey absorbs less moisture, so you would have to reduce the amount of applesauce in this case.

Use room temperature ingredients so they mix well.

To make it look pretty, save some chocolate candy for topping 🙂

Remove bars from oven when the top of the center is cooked, but still soft; Bars will continue to cook when cooling.

Let cool completely before cutting, or the bars will be too fudgy and fall apart.

Store Leftover Halloween Cookie Bars

These leftover halloween cookie bars can be stored on the countertop, in the fridge or even frozen.

Leftover halloween candy cookie bars on the countertop for 1-2 days, and in the fridge for 5 days (in an airtight container).

To freeze healthy protein powder halloween cookie bars recipe, place in freezer-safe zipper bag with parchment paper between each once, and keep 1-2 months; Don’t forget to thaw before eating!

Alternates for Protein Powder Halloween Cookie Bars

I recommend making this healthy halloween cookie bar recipe using the protein powder and other ingredients and products listed – since it gives the best results.

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

Whole Wheat Pastry Flour: All purpose flour or 1:1 Gluten Free Baking Flour, in the same amount by weight.
Applesauce: Mashed Banana or Pumpkin Puree
Zero Calorie Brown Sugar Alternative: Regular coconut sugar or brown sugar (this won’t be sugar free though, and also higher in calories)
Almond Butter: Peanut Butter, Tahini, Cashew Butter, or any nut or seed butter.
Sugar-free Chocolate: Regular Chocolate Chips

A Vegan Protein Halloween Cookie Bar Recipe

This healthy halloween cookie bar recipe can easily be made Vegan with the right substitutions.

For the perfect Vegan halloween cookie bar, make sure you use a plant based protein powder, flax egg, aquafaba for egg whites and also dairy-free candy.

More Protein Halloween Treats to Try