Save money and make your favorite sprinkle-filled protein bars at home. These no-bake Birthday Cake Protein Bars taste like a celebration — full of vanilla, sprinkles, and satisfying protein. The recipe can be made dairy- and egg-free while still delivering great flavor and texture. Prep takes about 5–10 minutes. Once you try these, you may prefer them to store-bought bars.
Originally published June 2019. Updated July 2021.
If you love protein bars but want a more cost-effective, customizable option, this homemade Birthday Cake Protein Bar recipe is perfect. It captures that sweet, nostalgic cake-batter flavor with the nutrition and convenience of a protein bar.
This version was inspired by a popular copycat recipe for a peanut butter dark chocolate chip “Perfect Bar,” and it’s been adapted to a birthday-cake flavor many readers requested.
Why you will love these Birthday Cake Protein Bars:
- Quick to prep. Everything comes together in under 10 minutes: mix, press into a pan, and chill.
- Freezer- and fridge-friendly. Slice and store bars in the fridge for short-term use or in the freezer for longer storage. Thaw a bar when a craving hits.
- No baking required. No oven time — simply combine, press, and chill until set.
- Easily made gluten-free or vegan. Use certified gluten-free oat flour and a vegan protein powder and plant milk to keep them plant-based.
- They actually taste good. Unlike some dry, bland store-bought options, these bars are rich, sweet, and truly enjoyable.
What you will need:
- Almond flour: Adds flavor and a tender texture. A blend of almond and oat flours yields the best balance; using only oat flour can feel drier.
- Oat flour: You can buy it or make your own by pulsing rolled oats in a blender until fine.
- Nut butter: Almond or cashew butter both work well. Choose a smooth, slightly runny nut butter for easier mixing.
- Vanilla protein powder: Pick a brand you enjoy — it impacts the final flavor significantly.
- Maple syrup: The preferred liquid sweetener here; you can substitute another liquid sweetener if desired.
- Vanilla extract: Boosts that birthday-cake flavor.
- Milk: Any milk or plant-based milk will do — add a tablespoon at a time to reach the desired consistency.
- Sprinkles: Your favorite rainbow sprinkles for color and fun.
How to make these:
Combine all dry ingredients and nut butter in a mixing bowl, leaving out the milk and sprinkles. Stir until well combined. It may look a bit crumbly at first.
Add milk a tablespoon at a time until the mixture holds together. The texture should be thick enough to form a ball without crumbling but not overly wet.
Fold in about two-thirds of the sprinkles, reserving the rest to press on top later.
Press the mixture firmly into a parchment-lined 8×8-inch pan. Use a spatula or the bottom of a flat glass to compress the mixture evenly — pressing firmly helps the bars hold together.
Sprinkle the remaining sprinkles on top and gently press them in. Freeze for 30–60 minutes until set, then slice into bars. Store in the refrigerator or freeze for longer storage.
Easy ways to add more protein:
- Use whole milk: Choosing whole milk adds a few extra grams of protein and calories.
- Add egg white powder: A common ingredient in commercial bars, egg white powder increases protein without changing flavor much (not vegan).
- Use a protein drink for the milk: Swap your milk with a protein-fortified beverage for an instant boost.
Recipe Tips and Notes:
- Your protein powder defines the flavor. A poor-tasting powder will make lackluster bars. A good vanilla powder or collagen peptides yield the best, least “chalky” results.
- Use a runny, creamy nut butter. Thinner almond or cashew butter mixes more easily. Let refrigerated nut butter sit at room temperature to loosen.
- Press firmly for sturdy bars. Compress the mixture well so the bars hold their shape after slicing.
- Make bites if you prefer. Roll the mixture into small balls for convenient protein bites instead of bars.
- Sprinkle note: If you avoid artificial dyes, choose naturally colored sprinkles.
Other protein-packed recipes:
-
Protein Overnight Oats
-
Orange Creamsicle Protein Smoothie
-
No Bake Blueberry Muffin Protein Bars
-
Protein Mac and Cheese
HUNGRY FOR MORE? Subscribe to the newsletter and follow for updates on new recipes, tips, and variations.
Birthday Cake Protein Bars
Ingredients
- 1 c almond flour
- 1/2 c oat flour
- 1/2 c almond butter or cashew butter
- 1/2 c vanilla protein powder
- 3 T milk of choice more if needed
- 1/3 – 1/2 c maple syrup
- 1 1/2 tsp vanilla extract
- 2 – 3 T rainbow sprinkles
- Dash of sea salt
Instructions
- Combine all ingredients except the milk and sprinkles in a medium bowl.
- Stir to combine, then knead with your hands until a dough forms. Add milk slowly until the mixture is thick but not wet. Fold in 2 tablespoons of sprinkles.
- Press the mixture very firmly into a parchment-lined 8×8 pan. For thicker bars, press less toward the edges.
- Press the remaining sprinkles on top, then freeze for about 30–60 minutes to set.
- Remove from the freezer, cut into bars, and store in the refrigerator.
Notes
- The protein powder matters: Choose a pleasant-tasting vanilla or collagen powder; a gritty or grassy powder will affect the bars.
- Use a runny nut butter: Thinner almond or cashew butter mixes more easily — remove from the fridge to soften if needed.
- Press firmly: Compress the mixture well so the bars are dense and hold together after slicing.
- Alternative format: Roll into bite-sized balls if you prefer snackable bites.
- Sprinkle choice: If you avoid artificial dyes, pick naturally colored sprinkles.
Nutrition
Carbohydrates: 28g,
Protein: 12g,
Fat: 17g
Nutrition information is automatically calculated and should be used as an approximation.