Brown sausage in a large saucepan. Use a paper towel to blot out most of the grease from the pan.
Add flour, butter, and half & half. Cook on medium-low, stirring often, for several minutes until thickened.
Add thyme, rosemary, red pepper flakes and black pepper.
Serve over warm biscuits.
Make ahead Instructions:You can make the gravy ahead of time and store it in a container in the fridge for 2-3 days, depending on the freshness of your ingredients.Rewarm on the stove, adding a splash of half and half or milk to thin it, if needed, and additional seasonings, to taste. Freezing instructions:I'd suggest making the recipe with whole milk, if you want to freeze it. (Half and half will have a slightly different texture upon reheating from frozen, but will still taste good). Thaw overnight in the fridge.Rewarm on the stove, adding a splash of half and half or milk to thin it, if needed, and additional seasonings, to taste. The biscuits can be made ahead and stored in the freezer for 3-5 months.