This Blue Spirulina Keto Smoothie looks like a tropical lagoon and tastes like a creamy, lightly sweet shake. It’s fast to make, easy to customize, and gentle on your carb count. You get a dose of protein and healthy fats without the sugar crash.
If you want a bright, feel-good breakfast or a post-workout pick-me-up, this smoothie delivers. Bonus: it’s gorgeous enough to share, but you’ll want to keep it all to yourself.
Blue Spirulina Keto Smoothie - A Vibrant, Low-Carb Power Drink
Ingredients
- 1 cup unsweetened almond milk (or full-fat coconut milk for extra creaminess)
- 1/2 small ripe avocado
- 1/2 cup ice (more for a thicker texture)
- 1–2 teaspoons blue spirulina powder (adjust for color and taste)
- 1 scoop unflavored or vanilla collagen peptides or whey isolate (optional, for protein)
- 1–2 teaspoons MCT oil or coconut oil (optional, for extra fats)
- 1/2 teaspoon vanilla extract
- 1–2 tablespoons fresh lemon juice (brightens flavor)
- Pinch of sea salt
- Keto-friendly sweetener to taste (monk fruit, stevia, or erythritol blend)
- Optional add-ins: a few fresh mint leaves, 1 tablespoon chia seeds, or 1 tablespoon unsweetened shredded coconut
Instructions
- Prep your blender. Add almond or coconut milk first. Liquids at the bottom help the blades catch everything.
- Add the fats and flavor. Scoop in avocado, MCT or coconut oil, vanilla, lemon juice, and a pinch of salt.
- Boost the body. Add your protein powder if using. It thickens the smoothie and improves satiety.
- Color it blue. Sprinkle in blue spirulina. Start with 1 teaspoon, then add more if you want a deeper shade.
- Sweeten wisely. Add your preferred keto sweetener. Begin with a small amount and adjust after blending.
- Chill and blend. Add the ice on top. Blend on high for 30–45 seconds, until creamy and smooth.
- Taste and tweak. Need more tang? Add lemon. Thicker? Add ice or a little avocado. Sweeter? A touch more sweetener.
- Serve immediately. Pour into a chilled glass. Top with shredded coconut or chia seeds if you like a little crunch.
Why This Recipe Works
This smoothie leans on low-carb ingredients that won’t knock you out of ketosis. Blue spirulina brings a natural ocean-blue color and a clean, earthy note without the seaweed taste you get from some algae powders.
Avocado and coconut milk add creaminess and satisfying fats, keeping you full longer. A dash of vanilla and a keto-friendly sweetener give it a milkshake vibe—no sugar needed. Plus, it comes together in under five minutes with minimal cleanup.
Ingredients
- 1 cup unsweetened almond milk (or full-fat coconut milk for extra creaminess)
- 1/2 small ripe avocado
- 1/2 cup ice (more for a thicker texture)
- 1–2 teaspoons blue spirulina powder (adjust for color and taste)
- 1 scoop unflavored or vanilla collagen peptides or whey isolate (optional, for protein)
- 1–2 teaspoons MCT oil or coconut oil (optional, for extra fats)
- 1/2 teaspoon vanilla extract
- 1–2 tablespoons fresh lemon juice (brightens flavor)
- Pinch of sea salt
- Keto-friendly sweetener to taste (monk fruit, stevia, or erythritol blend)
- Optional add-ins: a few fresh mint leaves, 1 tablespoon chia seeds, or 1 tablespoon unsweetened shredded coconut
How to Make It
- Prep your blender. Add almond or coconut milk first.
Liquids at the bottom help the blades catch everything.
- Add the fats and flavor. Scoop in avocado, MCT or coconut oil, vanilla, lemon juice, and a pinch of salt.
- Boost the body. Add your protein powder if using. It thickens the smoothie and improves satiety.
- Color it blue. Sprinkle in blue spirulina. Start with 1 teaspoon, then add more if you want a deeper shade.
- Sweeten wisely. Add your preferred keto sweetener.
Begin with a small amount and adjust after blending.
- Chill and blend. Add the ice on top. Blend on high for 30–45 seconds, until creamy and smooth.
- Taste and tweak. Need more tang? Add lemon.
Thicker? Add ice or a little avocado. Sweeter?
A touch more sweetener.
- Serve immediately. Pour into a chilled glass. Top with shredded coconut or chia seeds if you like a little crunch.
Storage Instructions
- Short-term: Store in a sealed jar in the fridge for up to 24 hours. Shake well before drinking, as natural separation may occur.
- Make-ahead packs: Portion avocado, spirulina, and optional add-ins in freezer bags.
When ready, add liquid and blend.
- Freezing: Freeze leftovers in silicone molds. Thaw in the fridge and re-blend with a splash of milk to restore creaminess.
Why This is Good for You
Blue spirulina is rich in phycocyanin, a natural pigment with antioxidant properties. It supports cellular health and brings that striking blue hue without artificial dyes.
Avocado and coconut milk supply monounsaturated and medium-chain fats, which help with satiety and steady energy. Protein powder adds muscle-friendly support and helps curb cravings. The smoothie is low in net carbs, making it a smart fit for keto or low-sugar lifestyles.
Common Mistakes to Avoid
- Using sweetened milk: It can spike carbs quickly.
Always choose unsweetened almond or coconut milk.
- Overdoing spirulina: Too much can taste grassy. Start small and build up for color and flavor.
- Skipping salt and acid: A pinch of salt and a splash of lemon wake up the flavors and balance sweetness.
- Blending too long with ice: Over-blending melts the ice and waters down your smoothie. Stop once creamy.
- Adding high-carb fruits: Bananas and mango aren’t keto-friendly.
If you want fruit notes, use a few frozen blueberries sparingly.
Recipe Variations
- Creamsicle Blue: Use coconut milk, add 1/4 teaspoon orange extract, and bump the vanilla. Tastes like a blue creamsicle.
- Minty Fresh: Blend in 4–6 fresh mint leaves and a few drops of peppermint extract. Finish with shredded coconut.
- Blueberry Hint: Add 1–2 tablespoons frozen blueberries for a subtle fruit note while keeping carbs low.
You may need slightly less sweetener.
- High-Protein Post-Workout: Use whey isolate, skip added oils, and add extra ice for a lighter, frothy finish.
- Extra-Thick Smoothie Bowl: Reduce liquid to 3/4 cup, add 1 tablespoon chia seeds, and top with hemp hearts and unsweetened coconut flakes.
- Dairy-Free and Nut-Free: Use full-fat coconut milk and skip whey. Collagen or a plant-based low-carb protein works well.
FAQ
What does blue spirulina taste like?
Blue spirulina has a mild, slightly earthy taste and is less briny than regular green spirulina. In this smoothie, vanilla, lemon, and healthy fats round it out so it tastes creamy and clean.
Is blue spirulina the same as butterfly pea powder?
No.
Both are blue, but butterfly pea is from a flower and has a tea-like flavor, while blue spirulina is algae-derived and offers antioxidant phycocyanin. They color similarly, but their nutrition profiles differ.
Can I make this without protein powder?
Yes. The smoothie will still be creamy thanks to avocado and coconut or almond milk.
If you skip protein, consider adding chia or hemp hearts for a light protein boost.
How do I keep carbs low?
Use unsweetened milk, keto-approved sweeteners, and avoid high-sugar fruits. Stick to small amounts of low-carb add-ins like chia seeds or a few blueberries if needed.
Will this break my fast?
Yes, it contains calories from fats and protein. If you practice intermittent fasting, enjoy it as your first meal to break your fast.
What can I use instead of avocado?
Try 2 tablespoons coconut cream or 1 tablespoon almond butter for creaminess.
Note that almond butter adds a nuttier flavor and slightly more carbs.
Can kids drink this?
Generally yes, but skip MCT oil if they’re not used to it and check for allergies. Always consult your pediatrician if you have concerns.
Why add lemon juice?
Lemon brightens the flavor, balances sweetness, and cuts any earthy notes from spirulina. It makes the whole smoothie taste fresher.
In Conclusion
This Blue Spirulina Keto Smoothie is simple, striking, and satisfying.
With clean ingredients and a customizable base, it fits mornings, workouts, or anytime you want a calm, steady energy lift. Keep the pantry staples on hand, and you’ll have a gorgeous, low-carb smoothie ready in minutes. It’s proof that eating well can be both easy and beautiful.