S'mores Cookie Bars

Melt the butter and stir in the brown sugar and granulated sugar.

Add the egg and vanilla extract to the wet mixture and mix well.

Stir in the flour, baking soda, and salt until a thick batter forms.

Fold in the chocolate chips.

Lay a layer of graham cracker squares on a parchment‑lined baking sheet.

Scoop portions of the cookie dough onto the crackers and press each ball into a flat layer covering the crackers.

Place marshmallows (and optional Hershey Pieces) on top of the dough layer.

Bake until golden brown and the marshmallows are lightly toasted, then let cool and cut into bars.