Tangzhong: Combine flour, water, and milk in a saucepan. Heat on low-medium, stirring frequently, 3–5 minutes until thickened (150°F). Cool before using.
Mix yeast with warm coconut cream; let sit 10 minutes.
Add remaining ingredients to a stand mixer. Knead on speed 1 for 8-12 minutes until smooth. Shape into a ball. Hand-knead the dough 10–14 minutes until smooth.
Transfer to a greased bowl; cover. First rise: 1 hour, until doubled.
Divide into 12 pieces (70–73g each). Shape each into a smooth ball; place in a greased 9"x13" pan.
Second rise: Cover 2 hours, until doubled.
Preheat oven to 320°F. Dust rolls with cornstarch. Bake 20–22 minutes until lightly golden.