Inspired by the biscuits at the Blue Bayou Restaurant in Disneyland!
Preheat the oven to 450 degrees and line a baking sheet with parchment paper.
Mix the sweet potato, cheese, and rosemary in a small bowl and set aside.
In a larger bowl, combine the dry ingredients. Once incorporated, add in the buttermilk and mix until just combined.
Add in the sweet potato mixture and incorporate. Don't overmix!
Turn out onto a floured surface and knead 2-3 times. Roll out to 1" thick and cut into 2" circles. Place onto baking sheet, leaving at least 2" between each biscuit.
Brush top of each biscuit with a little milk, and sprinkle freshly ground black pepper over tops. Bake for 10-12 minutes or until golden brown.