Place artichoke hearts, spinach, sour cream, onion, garlic, parmesan cheese, milk, feta cheese, mayonnaise, vinegar and pepper into a sllow cooker.

Stir until well combined. Top with cream cheese cubes.

Cover and cook on low heat for 2 hours.

Uncover and stir until cream cheese is well combined. Cover and cook on high heat for an additional 15 minutes.