Preheat oven to 350 degrees F. Line an 8x8 baking pan with nonstick aluminum foil.

Mix crushed vanilla wafers with 1/2 cup flour and 1/4 cup brown sugar. Next, cut in sliced, cold butter until mixture resembles coarse crumbs.

Place crumbs into prepared baking pan and press down with your hand. Bake for 15 minutes.

While the crust is baking, make the filling. Using an electric mixer (or stand mixer) beat together cream cheese and sugar until smooth.

Add eggs, one at a time and 2 tbsp. flour; mix well.

Then stir in 2 tbsp. lemon zest, lemon juice and baking powder. Mix well.

Once the crust is ready. Take it out of the oven and pour the prepared filling over the crust.

Bake for 25-30 minutes (until center is set and not jiggly.) Let it cool completely then refrigerate for about 2 hours.

Dust the top with powdered sugar and sprinkle with remaining lemon zest. Then slice into 9 squares.

Keep refrigerated.