Step 1
Combine 1/4 cup water and 1/2 teaspoon calcium chloride in a small bowl; mix well.
Step 2
Combine 1/4 cup water and 1/2 teaspoon rennet in another small bowl; mix well.
Step 3
Pour milk into a double boiler set over medium-low heat. Heat milk until it registers 86 degrees F (30 degrees C) on an instant-read thermometer. Sprinkle cheese culture on the surface. Allow to dissolve without stirring for a few minutes then stir well. Cover and keep at 86 degrees F (30 degrees C) for 1 hour.
Step 4
Pour calcium chloride mixture into the milk; stir for 1 minute. Add rennet mixture; stir for 1 to 2 minutes. Let stand at room temperature until milk sets into curd about 1 hour. Press edge of the curd gently with a palette knife or the back of a spoon to check for firmness.
Step 5
Cut curd all the way to the bottom of the pot into 1-inch squares. Stir gently with a rubber spatula. Let rest 5 to 10 minutes.
Step 6
Stir curds maintaining temperature at 86 degrees F (30 degrees C) until they sink to the bottom of the pot about 20 minutes. Scoop out liquid (whey) with a ladle and discard or reserve for another use.
Step 7
Line 2 basket-style molds with damp cheesecloth. Ladle curds into the molds with a slotted spoon and cover with ends of cheesecloth. Place one mold on top of the other pressing lightly. Let drain switching the molds and stirring curds a few times until cheese is firm at least 4 hours.
Step 8
Mix 8 cups water sea salt 1 teaspoon calcium chloride and white vinegar together in a large container to make brine. Submerge cheese in brine and let soak at least 8 hours and up to 3 weeks.