Julia Everist

Mix equal parts blue with red food dye to make purple.

Mix equal parts yellow and blue food dye to make green.

Natural dyes work best in royal icing or buttercream frosting, not cake batter.

Mix equal parts yellow and blue food dye to make green.

Natural dyes work best in royal icing (pictured here) or buttercream frosting, not cake batter. Here's how to make yellow food dye and blue food dye.

Mix equal parts blue with red food dye to make purple.