1. Follow cake instruction on the box, squeeze orange on glass measuring cup and add milk to come up to 1 1/3 cup fluid. Empty cake mix to the mixer, add all ingredients, and mix well at least 2 minutes. Bake according to the instruction. Let it cool completely before icing application.
2. Empty cream cheese and add sugar to the mixer. Mix well until well incorporated and silky moist. Add in heavy cream and whisk for at least 5 minutes. Mixture should stick together not runny when it's ready. Drop a little food color to the mixture and beat well. Into a piping bag with flower tip and form big flower starting from the edges to the middle.
Note: I use gel food color, best for pastel colors.