Birthday Cake Protein Blondies – The Ultimate Healthy Snack for Sweet Cravings is exactly what you need when you’re craving something sweet and high in protein. These bars are soft, thick, and loaded with sprinkles — perfect for satisfying your sweet tooth while keeping your healthy eating goals on track.
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Whether you’re searching for high protein snacks to keep you full between meals, or you love prepping healthy snacks for the week, these blondies check every box. They’re meal-prep friendly, made in one pan, and freezer-friendly, too.
This is one of my favorite high protein meal prep ideas that actually feels like a treat. If you love high protein meals or need new high protein recipes to rotate through your snack stash, these birthday cake bars belong in your lineup.
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I am an Amazon Affiliate. If you purchase any of the products I’ve linked below that are used in this recipe, I may earn a small commission — at absolutely no extra cost to you. These are the exact ingredients I recommend and use to get the perfect texture and flavor!
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What Makes These Protein Blondies So Amazing?
They’re soft and chewy with a lightly golden top, loaded with colorful rainbow sprinkles, and baked in a classic 13 x 9 pan — just like in the pictures. The inside is dense and cookie-dough-like, but they’re made with better-for-you ingredients like protein powder, almond flour, and a few smart swaps.
These bars are:
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Freezer-friendly
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Easy to slice and portion
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A feel-good choice for both adults and kids
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Totally customizable
PIN FOR LATER
Ingredients
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Baking Powder
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Salt
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Plain Greek Yogurt (Fat-Free)
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Almond Milk (Or Milk of Choice)
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Light Butter
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Egg
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Rainbow Sprinkles (Sugar-Free or Regular)
How to Make Birthday Cake Protein Blondies
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Prep the Pan
Spray a 13 x 9 inch baking pan with cooking spray and preheat your oven to 350°F. -
Mix the Wet Ingredients
In a large bowl, stir together the Greek yogurt, almond milk, melted butter, egg, and monkfruit sweetener until smooth. -
Add the Dry Ingredients
Add in the protein powder, almond flour, coconut flour, baking powder, and salt. Stir until fully combined. The batter will be thick and dense. -
Fold in Sprinkles
Gently stir in your rainbow sprinkles (use as many as you like!) and smooth the batter evenly into your prepared pan. -
Bake & Cool
Bake for 22–26 minutes until the edges are lightly golden and the top is just set. Let the blondies cool completely before slicing for the best clean edges. -
Slice & Store
Cut into squares and store in the fridge for 5–7 days or freeze individually for grab-and-go snacks.
Birthday Cake Protein Blondies – The Ultimate Healthy Snack for Sweet Cravings
Ingredients
- 1 Cup Orgain Vanilla Protein Powder LInk in Post
- 1 Cup Almond Flour Link in Post
- 2 Tbl Coconut Flour Link in Pot
- 1 Tsp Baking Powder
- 1/4 Tsp Salt
- 3/4 Cup Fat Free Plain Greek Yogurt I love Fage
- 1/2 Cup Skim Milk
- 3 Tbl Light Butter, Melted
- 1/3 Cup Lakanto Monkfruit Sweetener (or sweetener of choice)
- 1 Large Egg
- 1/3 Cup Sugar Free Rainbow Sprinkles (use jimmies) Link in Post
Instructions
- Preheat Oven & Prep Pan Preheat your oven to 350°F. Spray a 13 x 9 inch metal baking pan with cooking spray and set aside.
- Mix Wet Ingredients In a large bowl, whisk together the Greek yogurt, milk, melted light butter, monkfruit sweetener, and egg until smooth.
- Add Dry Ingredients Stir in the vanilla protein powder, almond flour, coconut flour, baking powder, and salt. Mix until a thick batter forms.
- Fold in Sprinkles Gently fold in the rainbow sprinkles, being careful not to overmix.
- Spread Batter Spread the thick batter evenly into the prepared 13 x 9 pan, smoothing out the top with a spatula.
- Bake Bake for 22–26 minutes, or until the edges are lightly golden and the top looks just set. Avoid overbaking for the best texture.
- Cool & Slice Allow the blondies to cool completely in the pan before slicing into 12 even squares. Serve or Store Store in the refrigerator for up to 7 days or freeze individually for longer storage.
- This makes 12 bars. Each bar is 2 WW Points. Enjoy!
Nutrition
❓ Frequently Asked Questions (FAQs)
Can I Use a Different Protein Powder?
Yes — but stick with vanilla whey or plant-based for the best flavor and texture. Chocolate or fruity flavors will drastically change the outcome.
How Much Protein Is in Each Bar?
That depends on your protein powder brand, but most bars will have 14 grams of protein per serving.
Can I Freeze These?
Absolutely. Freeze individual slices in a single layer, then transfer to a bag or container. They thaw beautifully in the fridge or microwave.
Can I Use All-Purpose Flour Instead of Almond or Coconut Flour?
Not in this recipe. Almond and coconut flours absorb moisture differently, and swapping could make the bars too dry or gummy.
Are These WW Friendly?
Yes! Use fat-free Greek yogurt, a sugar substitute like Lakanto, and light butter to keep the points low. Sub in sugar-free sprinkles if needed.
Can I Make These Dairy-Free?
Yep! Use a non-dairy yogurt and plant-based protein powder. Make sure your sprinkles and milk choice are also dairy-free.
What Type of Sprinkles Work Best?
Rainbow jimmies (not nonpareils) hold up best in baking. Nonpareils tend to bleed into the batter.
Are These Bars Chewy or Cake-Like?
They’re dense and chewy, not cakey. They mimic the texture of a thick cookie dough blondie with a hint of softness.
Can I Use This as a Post-Workout Snack?
Yes — it’s loaded with protein and carbs to help with recovery, and the fun flavor makes it feel like a treat.
How to Use These in Meal Prep
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Store bars in a glass container layered with parchment
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Wrap individual bars in foil for grab-and-go
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Freeze half the batch to rotate your weekly snacks
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Use as a pre-gym energy boost or a post-lunch sweet bite
These are one of my go-to high protein snacks for busy weeks!
Pro Tips for Perfect Blondies
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Don’t overbake – they’ll continue cooking as they cool
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Chill before slicing for perfect clean cuts
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Weigh your protein powder – scoops can vary!
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Add extra sprinkles on top just before baking for a vibrant finish
Whether you’re looking to upgrade your weekly high protein snacks, add more variety to your healthy snacks, or just want a fun new recipe that tastes like dessert — these Birthday Cake Protein Blondies are it. They’re colorful, satisfying, and so easy to make. Try them once, and they’ll be part of your regular high protein meal prep routine in no time. Let me know in the comments how yours turned out, and don’t forget to pin it for later!
