01 -
In a large bowl, whisk together the flour, baking powder, baking soda, and sea salt until evenly mixed with no lumps.
02 -
Add the cold cubed butter to the dry mixture. Using a pastry cutter or fingers, quickly cut the butter into the flour until the texture resembles coarse crumbs with visible butter pieces.
03 -
Pour the cold buttermilk into the mixture. Stir gently with a fork or spatula just until the dough comes together with no dry spots; avoid overmixing.
04 -
Turn the dough onto a floured surface. Gently pat it out and fold it over itself three to four times to develop layers. Roll the dough to about 1 inch thickness, handling carefully to preserve airiness.
05 -
Using a sharp biscuit cutter, press straight down without twisting to cut biscuits. Place them close together on a baking sheet. Bake at 450°F (232°C) for 12 to 15 minutes until tall and golden brown.
06 -
While biscuits bake, shape sausage into four patties slightly wider than biscuits. Cook in a medium-heat skillet for 3 to 4 minutes per side, pressing gently to brown evenly and cook through. Drain excess grease.
07 -
Split warm biscuits with a serrated knife. Place a sausage patty on bottom half, add cheese if desired, then sandwich with top half. Serve immediately for melted cheese and optimal warmth.