I've baked this pie several times before using the recipe as written. I read several of the reviews and made the following changes with great results: reduce butter to 1/2 cup, add 2 tsp vanilla extract and 2 tsp instant espresso granules. Blend the eggs and sugar thoroughly before gradually adding the melted butter. The filling is really thick. Bake as directed. Excellent results! Tastes like a thick, chewy chocolaty chocolate chip cookie.