Yes. Add a couple of tsp of baking soda to your fondant and knead it in. You won’t taste the baking soda, and it helps “set” the colour. I do this with purple, but it works for black too. Especially if it’s homemade.
Hope this helps…..
Creativity is God's gift to us. Using our creativity is our gift back to God. Clarky's Cakes 😎