If you’ve been looking for a birthday cake protein cookie that actually tastes like a real cookie, this is it.

These soft-baked protein cookies are packed with rainbow sprinkles, have that classic “funfetti” flavor, and still give you a boost of protein thanks to BetterDays Birthday Cake Protein.

They’re buttery, slightly chewy, and feel like a treat… not a “healthy substitute.”

Why You’ll Love These Protein Cookies

Soft centers with lightly crisp edges
Real birthday cake flavor (not chalky protein taste)
Easy, one-bowl dough
Freezer-friendly
Customizable with gluten-free and dairy-free swaps

birthday cake protein powder
Code: cookies

BetterDays Birthday Cake Protein Cookies

Soft, bakery-style birthday cake protein cookies packed with sprinkles and sweet vanilla flavor, made with added protein for a fun treat that still feels a little more balanced.

Prep Time10

Cook Time12

Keyword: birthday cake cookies, protein cookies, protein desserts

Servings: cookies

Calories: 220kcal

Equipment

mixer

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Ingredients

Dry Ingredients:

1 1/4 cups all-purpose flour
1/2 cup BetterDays Birthday Cake Protein Powder
1/2 tsp baking powder
1/4 tsp baking soda
1/2 tsp salt

Wet Ingredients:

1/2 cup unsalted butter softened
1/2 cup granulated sugar
1/4 cup brown sugar
1 large egg
1 tsp vanilla extract
1 tsp almond extract

Mix-Ins

1/3 cup rainbow sprinkles
Extra sprinkles for rolling

Instructions

Preheat oven to 350°F and line a baking sheet with parchment paper.
In a medium bowl, whisk together flour, protein powder, baking powder, baking soda, and salt.
In a separate bowl, beat butter, granulated sugar, and brown sugar until light and fluffy.
Mix in the egg, vanilla extract, and almond extract until smooth.
Add dry ingredients to wet and mix until just combined.
Fold in rainbow sprinkles.
Scoop 2–3 tablespoon-sized dough balls and roll in extra sprinkles.
Chill dough for 20 minutes. This step is key for thicker, bakery-style cookies.
Bake for 10–12 minutes, until edges are set and centers are soft.
Let cookies cool on the pan for 5 minutes before transferring.

Nutrition

betterdays x jenny cookies birthday cake protein powder

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Tips for the Best Protein Cookies

This is where most protein cookie recipes fail, so pay attention:

Don’t overbake
Protein powder dries out fast. Slightly underbaked = perfect texture.
Chill the dough
Skipping this gives you flat cookies. Period.
Use a high-quality protein powder
Cheap protein = dry, gritty cookies. This recipe is built around BetterDays.
Measure flour correctly
Too much flour = dense, dry cookies. Spoon and level.

my baking favorites!

Easy Ingredient Swaps

Gluten-Free: Use Bob’s Red Mill 1:1 Gluten-Free Baking Flour
Dairy-Free: Swap butter for coconut oil
Lower Sugar Option: Use coconut sugar or date sugar
Almond Flour Option: Substitute almond flour (add 2–3 tbsp milk for texture)

How to Store

Room temp: 3–4 days in an airtight container
Fridge: up to 1 week
Freezer: up to 2 months (freeze baked or dough balls)

Frequently Asked Questions

Are protein cookies actually healthy?

They’re a better option than traditional cookies, but still a treat. You’re getting added protein without sacrificing flavor.

Can I make these without protein powder?

You can, but you’ll need to adjust the flour and texture. This recipe is designed specifically for protein powder.

Why are my protein cookies dry?

You either overbaked them, used too much flour, or your protein powder isn’t great. That’s usually the truth.

Most protein cookies try to convince you they’re “just as good” as regular cookies.

These actually are.

If you want a soft, bakery-style birthday cake cookie with a protein boost, this is the one to make.

If you make these cookies with the birthday cake protein powder, let me know! I always love hearing from you.

This post contains affiliate links. I only recommend products I actually use and love!

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BetterDays Birthday Cake Protein Cookies (Soft, Chewy & High-Protein)