How does energy transfer in smores?

In s'mores, energy transfer occurs primarily through heat conduction and radiation. When the marshmallow is roasted over an open flame, it absorbs thermal energy from the fire, causing the sugars to melt and the marshmallow to soften. This heat is then transferred to the chocolate when the warm marshmallow is sandwiched between graham crackers, causing the chocolate to melt. Ultimately, the energy from the flame transforms into the delicious, gooey treat enjoyed by many.