01 -
Combine graham cracker crumbs, both flours, white and brown sugars, baking soda, baking powder, salt, and cinnamon in a food processor. Pulse until fully integrated with a sandy consistency. Add cubed butter and pulse until mixture resembles coarse meal. Add egg, vanilla, molasses, and milk, pulsing gently until dough forms. Do not overmix. Shape dough into a disc, wrap in plastic, and refrigerate for at least 35 minutes.
02 -
Lightly flour a clean work surface. Roll chilled dough to 6 mm thickness using a rolling pin. Cut dough into rectangles or desired shapes with cutters. Arrange on a parchment-lined baking tray, spacing each piece. Knead and reroll scraps as needed to use all dough.
03 -
Preheat oven to 175°C. Place trays in center of oven and bake cookies for 17 minutes, or until golden at edges with just set centers. Remove and cool cookies completely on a wire rack before assembling.
04 -
Place chopped chocolate in a heatproof bowl. Gently heat heavy cream in a saucepan until steaming but not boiling. Pour hot cream over chocolate and let stand 3–5 minutes. Stir until smooth and glossy. Place in freezer for 10 minutes to firm for spreading.
05 -
Set a heatproof bowl over a simmering saucepan of water (double boiler). Add miniature marshmallows and corn syrup, stirring until nearly melted. Stir constantly for a glossy, lump-free mixture. Blend in optional vanilla. Remove from heat and cool until just spreadable.
06 -
Once cookies are cool, spread a thick layer of ganache on half the cookies. Spread marshmallow fluff on remaining cookies. Gently sandwich cookies so both fillings meet. Optionally broil sandwiched cookies for a lightly toasted top, watching closely.