The Dahl estate partnered with Green’s baking company* to create a line of baking kits inspired by Dahl’s classic stories. These are no longer available.
*I can’t figure out if it was Green’s Cakes in the UK or Green’s Baking in Australia. Frustratingly, my site is the only source for this on the Internet! And I can’t remember where I found it. Let me know if you know where it’s from!
This “Charlie and the Chocolate Factory Magical Muffins” kit made 8 chocolate chip muffins with mini marshmallows.