Pre-heat oven to 400 degrees and line a baking sheet with parchment paper.
In a large bowl, whisk together together flour, sugar, baking powder, paprika, cream of tartar, and salt.
Add butter to flour mixture and using a pastry blender or your fingers, blend together until the mixture resembles coarse meal. Mix in scallions and chorizo.
In a separate small bowl, whisk together buttermilk and egg. Add liquid mixture to the flour mixture and stir until it’s just incorporated, taking care not to over-mix.
Scoop about ¼ cup of dough with a measuring cup or ice cream scoop onto prepared baking sheet. Place about 2 inches apart. You can also use a biscuit cutter to give the dough a little more shape.
Bake for 18-20 minutes, until biscuits are just starting to turn golden.