Add orange food coloring in one and yellow in the other. (iheartnaptime.net)
Add the flour and mix by hand with a spoon, add a couple of drops of orange food color. (bewitchingkitchen.com)
Combine all ingredients together in a medium bowl and whisk or beat with a hand mixer until smooth, adding orange food coloring until desired shade is reached. (thecrumbykitchen.com)