Heat oven to 350 degrees f. Grease an 8 to 9” springform pan with butter Grind graham crackers in a food processor, and stir in melted butter Until mixed well, then evenly apply to the bottom of the springform pan Sift flour & sugar into a small bowl, then stir in (well beaten) Ricotta Cheese Then, add 5 eggs, one at a time, once stirred in then add 2 teaspoons of Vanilla extract. Pour in mixed batter (Ricotta), level out, then bake at 350 degrees for 50 to 60 minutes (depending on the oven) until a beautiful golden brown. Let cool for a couple of hours, then refrigerate until nice and cold. Dust the cake with powdered sugar if you choose.