Place a large pot on Medium to high heat and add milk and cream, salt and pepper, whisk in corn meal and stir until it thickens, keep stirring! If you leave it without stirring it could burn! Be patient. Well actually for me personally, cooking is therapy! Relax and whisk, whisk, whisk! The grits take about 10 minutes or so to start to thicken up. Then remove from heat and add in the butter.