Preheat the convection oven to 350 degrees F.
Add all the dry ingredients into a large bowl and stir to combine. Grate the frozen butter into the dry ingredients. Add the blue cheese, spinach, parsley, and green onions. Make a well and add the eggs and half the buttermilk. Fold until just holding together , adding more buttermilk as needed. Line a sheet pan with parchment paper. Scoop 3-ounce portions of batter onto the paper. Bake for 22 minutes.
This recipe was provided by a chef, restaurant or culinary professional. It has not been tested for home use.
Recipe courtesy of Bess Giannakakis, Colossal Cafe, Minneapolis, MN