Blue Ternate Rice: Using Food-Grade Butterfly Pea Without Artificial Dye

Blue ternate, or butterfly pea, can colour rice without changing the rice-to-water balance. The Philippine Department of Agriculture’s edible-flower bulletin identifies Clitoria ternatea and documents its use to tint boiled rice blue. Buy flowers specifically grown and sold for food: a familiar flower name or a decorative bouquet does not establish that it is suitable for the kitchen. Source 1

Measure the rice water first

For about four side portions, use 250 g ordinary white rice and the water amount specified for that rice and cooking method. Have a fine sieve ready. Follow the strength and preparation directions on a labelled culinary butterfly-pea product; where the supplier gives no strength guidance, 8–12 whole dried food-grade flowers provide a modest starting colour trial. Flower size and drying vary, so this is an editorial kitchen starting point, not a standardised colour guarantee.

1. Rinse the rice if its instructions call for rinsing, then drain. Do this before adding any coloured liquid.
2. Prepare the flowers according to their food directions. Infuse them in a small portion of the measured hot cooking water until blue, then strain out all petals and debris.
3. Measure the strained infusion and add clean water to reach the rice’s normal total liquid allowance. Any water lost during straining is replaced within that total.
4. Combine the drained rice and measured blue liquid. Cook according to the rice packet and appliance instructions, including the resting stage; repeatedly lifting the lid changes cooking conditions.
5. Fluff gently. Check that the grains are cooked through and that the colour is reasonably even. A pale batch needs a stronger infusion next time, rather than extra liquid poured into finished rice.
6. Serve promptly with the flower ingredient identified. Keep a plain-rice option when the ingredient does not suit a guest.

Choose the ingredient as carefully as the colour

The DA bulletin identifies species mix-ups, pesticide residues and contamination as concerns with edible flowers. Use a culinary supplier and follow its handling directions; do not forage from an unidentified plant or use florist stock. Washing cannot establish the identity or growing history of a flower. Source 1

For shared meals, disclose butterfly pea before serving and check ingredients with anyone who has a relevant allergy. Do not use a small tasting as a home allergy test. The guide to cooking for food allergies explains the ingredient checks and separate utensils that may be needed.

Keep the rice texture and storage separate from its colour

Blue colour does not preserve rice. If keeping leftovers, divide them into shallow portions, cool quickly—ideally within one hour—and refrigerate. Use within 24 hours and reheat only once, until steaming hot throughout. Follow the rice cooling and reheating guide for the same care you would give an uncoloured batch. Source 2

Record the rice brand, liquid total and flower product used. Change only the infusion strength on the next attempt so you can judge colour without accidentally changing hydration. Serve citrus or other strongly flavoured accompaniments separately if you want the rice itself to stay mild.