Preheat your oven to 350°F (175°C) and line a muffin tin with cupcake liners.
In a large bowl, whisk together graham cracker crumbs, flour, sugars, baking powder, cinnamon, and salt.
In another bowl, mix melted butter, eggs, vanilla extract, and milk until smooth.
Combine wet ingredients with dry ingredients; stir until just mixed.
Fold in chocolate chips and mini marshmallows gently.
Fill each cupcake liner about two-thirds full with batter.
Bake for 20-22 minutes or until golden brown; a toothpick inserted should come out clean.
Let cool for five minutes before transferring to wire racks to cool completely.