In a food processor or by hand, finely crush the graham crackers.

Combine the crushed graham crackers with melted butter to form a crust mixture.

Press the graham cracker mixture firmly into the base of your baking pan to form an even crust.

In a large bowl, blend the cream cheese and sugar until smooth.

Incorporate the eggs, vanilla extract, and lemon zest into the cream cheese mixture, stirring until well combined.

Pour the cream cheese filling onto the prepared graham cracker crust.

Bake the Cream Cheese Squares in a preheated oven until the filling is set and the edges are golden brown.

Allow the squares to cool at room temperature, and then refrigerate them for a few hours until fully set.