How do you all color your buttercream after you have mixed up a big batch in your mixer?
What is your process?
I usually take small portions and put it into small bowls, add color and mix it well with a spatula,then transfer to individual bags. I don't color the whole batch the same color unless I use it for the base coat of a cake.
I add a little bit of color with a toothpick, mix well and if the color isn't the shade I want I add more color until it is.
Is that the kind of answer you were looking for?
Never put the toothpick back in the paste jar if you are using paste coloring. Use a new toothpick every time you dip in. The frosting will contaminate the jar if you get any in it.