Preheat oven to 350oF (180oC).
To a bowl, add sugar, and oil. Mix well.
Sift in flour, baking powder and cocoa powder. Mix
Add food coloring gel and mix.
Transfer dough between two sheets of parchment paper. Roll until about 0.5 cm.Cut out hearts with a cookie cutter. Place hearts on parchment paper onto a baking tray. Add coconut chunks on top (optional).
Bake in preheated oven to 350oF (180oC), rack middle position,10 minutes.
Let cookies cool down in pan for 10 minutes. Then transfer to wire rack to cool down completely.