Combine graham cracker crumbs, butter and 1/4 cup of the sugar in a food processor. Press into the bottom an sides of a small sprig form pan (I think I used an 8")
Using an electric mixer with the paddle attachment, blend the cream cheese until smooth and creamy. Add the ricotta cheese and vanilla. Mix well.
Add eggs, one at a time and blend.
Pour into crust.
Bake for 70 minutes. Turn the oven off and open the door slightly. Leave cheesecake in oven for one hour.