For the flakiest biscuits, ensure your butter and ricotta are very cold. You can even chill the flour mixture before adding the wet ingredients. Don't overwork the dough! Overmixing will result in tough biscuits. Feel free to experiment with different herb combinations to suit your taste. Rosemary, sage, or dill would also be delicious. These biscuits are best enjoyed fresh, but can be stored in an airtight container for up to 2 days. Reheat in a warm oven to restore their crispness.