4 eggs, beaten
1-1/3 cups buttermilk (milk + vinegar)
1-1/2 cups sugar
2/3 cup baking mix (e.g. Bisquick)
7 tablespoons butter, melted
1-1/2 teaspoons vanilla extract
Put 1 tablespoon white vinegar in a 2-cup measuring cup and add plain milk until it reaches the 1-1/3 cup line. Then let it sit for 5 minutes. That's a quick and easy way to sour milk to make "buttermilk." You can use real buttermilk, but I think it tastes better this way.
Mix all the ingredients together until smooth. What I do is put the eggs in a bowl and beat them, then add everything else and whisk it good. I don't even need a mixer.
Pour the mixture into a 9-inch greased pie plate. Bake at 350 for 50-60 minutes or until a toothpick inserted in the center comes out clean. The top should also be golden brown.
That's it. It's so easy. Now all you have to do is enjoy it.