In a large cast iron skillet over medium heat brown the sausage until cooked through and no longer pink.

Once cooked, drain onto a paper towel lined large dinner plate or bowl.

Return pan to the heat.

Add the butter into the empty skillet. Once melted add in the flour and stir until the flour is "melted" into the butter and no lumps remain. About 1-2 minutes.

Add in the milk and stir until well combined. Continue to stir occasionally until the milk becomes thicker. About five minutes.

Stir in the salt.

Add back in the sausage and stir to combine. Cook until the sausage is warm then pull off the heat and serve over warm biscuits.