Line cupcake tins or muffin molds with paper liners (size 3 oz - makes 12 pcs). In a small bowl, combine graham cracker crumbs, melted butter, and sugar using spoon or fork. Press 1 Tbsp of mixture into the bottom of each cupcake liner and press firmly to pack (I used cup measuring cup round bottom). Refrigerate while preparing the cheesecake batter.