Agar Agar Bisque Gel

Name: Agar Agar Bisque Gel
Yield: 500 ml base
Ingredients: 500 ml Prawn or shellfish bisque, well strained, with no separate fat layer; 3.5 to 4 g Agar agar; 0.5 to 1 g Spirulina powder; 5 ml Fresh lemon juice or white grape vinegar, optional; a pinch if needed Fine sea salt

Shellfish bisque set with agar, coloured with a restrained amount of spirulina and blended as needed.

A savoury marine gel that can be cut cleanly or blended into a smooth plating gel.

500 ml base

Cook this

Ingredients

Prawn or shellfish bisque, well strained, with no separate fat layer500 ml
Agar agar3.5 to 4 g
Spirulina powder0.5 to 1 g
Fresh lemon juice or white grape vinegar, optional5 ml
Fine sea salta pinch if needed

Method

Whisk the agar into the cold bisque until completely dispersed.
Bring to a full rolling boil and boil for 60 to 90 seconds while whisking.
Remove from the heat.
Mix the spirulina with a tablespoon of the warm bisque first, then whisk it back into the pan and blend briefly.
Pour into a shallow tray and chill for 20 to 30 minutes until fully set.
For a fluid gel, blend the set gel until smooth. Loosen with a little hot bisque if needed.

Chef’s notes

Start with the smaller amount of spirulina; colour intensifies quickly.

Allergens and diet

Shellfish.

Gluten free

Last refined · September 2026