Start by thawing your frozen chopped spinach. Once thawed, drain it thoroughly and squeeze it dry to remove any excess moisture.
In a mixing bowl, combine the drained spinach, mayonnaise, Greek yogurt, grated Parmesan cheese, minced shallot, minced garlic, salt, black pepper, and cayenne pepper. Mix everything until well combined and creamy.
Taste your dip and adjust salt, pepper, or cayenne based on your preferences.
Cover the bowl and refrigerate the dip for at least 30 minutes before serving.
Give your Easy Spinach Dip a final stir, transfer it to a serving dish, and serve with your favorite dippers.