Made from petroleum, red dye 40 is a synthetic food dye. Some studies suggest a link between red dye 40 and ADHD behavior; the dye might trigger or exacerbate behavioral changes in sensitive children.

Preheat oven to 180ºC and grease 2 x 22 cm cake pans. Beat together the oil, sugar and eggs until light and fluffy. Mix in the yoghurt, vanilla, vinegar and food colouring. Sift in the dry ingredients ...