Is foil cupcake liner color toxic?
I baked these very buttery cakes in copper colored foil cupcake liners and when I pulled them out, there was a pool of copper colored butter in the bottom of each pan indentation. I thought it was just bitter that had seeped through (dark pan) until I realized the bottom half of reach liner had lost its color. I had already stacked a few up, forgetting to wipe the bottoms, and a bit of the dye/butter mixture may have seeped into a few of the cakes. Are these safe to eat?