STEP 1: START WHISKING HEAVY CREAM
Affix the wire whisk accessory to a KitchenAid® stand mixer. Add heavy cream to the mixing bowl. Attach the pouring shield. Start the mixer on the slowest setting, gradually raising the speed to the fastest setting. Keep a dish towel on hand to cover the pouring spout if the cream splashes out.
STEP 2: WATCH FOR THE CREAM TO SEPARATE
The cream will go through three stages: soft peaks, then stiff peaks and finally the butter solids will separate from the buttermilk. Once you see the butter solids separate, stop the stand mixer and pour out the buttermilk. (The buttermilk can be reserved for other uses.)
STEP 3: PRESS THE BUTTER
Transfer the butter to a fine mesh sieve set over a large bowl. Using a spatula, press the butter into the sieve to remove any excess buttermilk. (The less buttermilk that remains in the butter, the longer the butter may last.)
STEP 4: RINSE THE BUTTER
Clean the KitchenAid® stand mixer bowl, then return the butter to it. Add 1/4 cup of ice-cold water to the bowl then whip the butter again for around 10 seconds to “wash” the butter and get rid of any excess buttermilk. Once the water becomes cloudy pour it out and repeat the process until the water remains clear.