I once tried adding pureed cauliflower into muffins to increase the vegetable count for the kids. They thought the muffins were great.
After the second batch, the girl child noticed the compost pile had cauliflower cuttings in it.
And that ... was the end of the cauliflower enhanced muffins.
We did that! We also used quinoa and other such madness. It always works the first time then had diminishing returns after that!