Pandanas leaves

Pandanas leaves are long narrow dark green leaves from the Screwpine or Pandanas tree. (Pandanus amaryllifolius Roxb). The leaves are called hala in Hawaii and commonly referred to as the screw-pine. The Thai word for pandan is bai toey hom. 

The leaves have a sweet aroma which can be used as a flavoring for rice and for puddings and other desserts.  The pigment is also used as food coloring. Pandanas leaves can be purchased in "bundles" in some Asian grocery stores.  Other products made from the pandan include pandan essence and pandan juice. Read more about Pandanas

If you don't have fresh Pandanas leaves you can use a pandan flavoring or essence
OR> Use green food coloring and vanilla