Mix together the crust ingredients and press into your preferred pan. You can press the crust just into the bottom, or up the sides of the pan too – baker’s choice. Set crust aside.
Combine cream cheese and sugar in the bowl of a stand-mixer (or in a large bowl if using a hand-mixer) and cream together until smooth. Add eggs, one at a time, fully incorporating each before adding the next.
Make sure to scrape down the bowl in between each egg. Add heavy cream, vanilla, lemon juice, and liqueur (if using) and blend until smooth and creamy.