Easter Chocolate Pudding Chromatography

Mixing up some boxed chocolate pudding for my daughter's birthday party, I committed the same mistake as Matthew McConaughey in The Wedding Planner talking about brown M&M's--assuming that because it was chocolate, and that it was brown, that the brown color was all chocolate. (When we make chocolate pudding from scratch, with real chocolate, it's brown!) But a glance at the box told me otherwise--just like the coating on brown M&M's, Jell-O chocolate pudding has red, yellow, and blue food dye.

Naturally, I had to go looking for the dye. I wish I'd done the experiment before I mixed the pudding--diluting the pudding with milk made the colors harder to see. But I did get some color separation.
I don't know why I didn't see any blue. Maybe because the pudding was mixed with milk by the time I thought to test it, diluting the colors? Or maybe there just wasn't very much. There isn't much blue in M&M's.

We went ahead and used the chocolate pudding for my daughter's birthday party, turning "chocolate dirt pudding pots" with gummi worms and cookie crumbs into Easter egg hunting treats.

But my kids ended up not liking the pudding. Guess they're too used to the real thing.

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