Preheat oven to 350 degrees.
In a large bowl, beat eggs & sugar until smooth. Mix in buttermilk & melted butter. Stir in coconut & vanilla. Divide the batter equally between both pie crusts.
Bake for 15 minutes, then cover the crust with a strip of tin foil or a pie crust shield to prevent the crust burning. Bake for an additional 30-35 minutes (45-50 minutes total bake time).