Blue Spirulina — Color Without Compromise

Most food colorings are synthetic dyes. They color your cream and add nothing else — or worse, they carry hidden carbohydrates in the form of maltodextrin and corn syrup solids used as carrier agents. Blue spirulina is a different category of ingredient entirely.

What It Actually Is

Blue spirulina is a pigment extracted from algae — specifically phycocyanin, isolated from Arthrospira platensis. Unlike green spirulina powder, which has a strong algae flavor and a deep green color, blue spirulina is the pure pigment extract. It has virtually no taste and delivers a clear, vibrant blue.

For keto baking, the most important number is this: zero net carbs per serving. No fillers, no maltodextrin, no hidden sugars.

Color Range and Dosage

The color intensity of blue spirulina scales predictably with dose:

1/4 teaspoon in 200g of cream gives a soft pastel blue. 1 teaspoon gives a deep, saturated turquoise. The exact result depends on the fat content of the base — higher fat intensifies the pigment.

Mixed with beetroot powder, it creates violet and purple tones. Two parts blue spirulina to one part beetroot gives a reliable violet. Adjust the ratio for warmer or cooler tones.

How to Use It

In mascarpone cream: Add to fully whipped cream and fold gently. Over-mixing shifts the color from blue to grey — the pigment is sensitive to mechanical stress.

In coconut cream: Works best in chilled cream. The high fat content helps the pigment stay vibrant and even.

In white chocolate glaze: Add after melting, below 45°C, and stir slowly.

One rule applies across all applications: never add the powder directly to cream without dissolving it first. Dry powder creates uneven color and visible specks in the final texture. Dissolve in a small amount of liquid before incorporating.

The Heat Limit

Blue spirulina degrades above 65°C. This is not a keto consideration — it is a chemistry one. The pigment simply breaks down at higher temperatures. Use it only in cold applications: creams, frostings, glazes, and decorations. Never bake it.

LAB NOTE: Blue spirulina is not the same as green spirulina powder. Green has a strong algae flavor and a different color profile. Blue is the isolated pigment only — no flavor, pure color.