Chocolate Chip Cheesecake Bars with Chocolate Crust

and 1/2 cups crushed chocolate graham crackers

butter, melted (real butter, no substitutions)

granulated sugar (for the crust

) cream cheese (24 ounces) at room temperature

granulated sugar (for the cream cheese mixture)

buttermilk

large eggs

vanilla extract

chocolate chips, mini or regular or whatever you have.