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In a large mixing bowl, combine the softened unsalted butter, brown sugar, and granulated sugar. Beat with an electric mixer until the mixture is light and creamy, about 2-3 minutes.

Crack the egg into the butter mixture, then add the vanilla extract. Mix until well combined.

In a separate bowl, whisk together the all-purpose flour, salt, cornstarch, and baking soda.

Gradually add the dry ingredients to the wet ingredients, mixing on low speed until almost fully combined. Do not overmix.

Fold in the chocolate chips until evenly distributed throughout the cookie dough.

Prepare the S'mores filling: Place one piece of chocolate on top of each graham cracker square, then top with one large marshmallow.

Take a generous portion of cookie dough and flatten it in your hand. Carefully place one prepared S'mores stack (graham cracker, chocolate, marshmallow) in the center of the dough. Gently wrap the cookie dough around the S'mores stack, ensuring it is completely covered and sealed.

Place the covered S'mores cookies on a baking sheet lined with parchment paper. Refrigerate the cookies for at least 1 hour.

Preheat your oven to 375°F (190°C).

Bake the chilled cookies for 10-12 minutes, or until the edges are golden brown and the centers are set but still slightly soft. The marshmallow inside will be gooey.

Let the cookies cool on the baking sheet for a few minutes before transferring them to a wire rack to cool completely. Serve warm and enjoy the gooey S'mores goodness!


In a large mixing bowl, combine the softened unsalted butter, brown sugar, and granulated sugar. Beat with an electric mixer until the mixture is light and creamy, about 2-3 minutes.

Crack the egg into the butter mixture, then add the vanilla extract. Mix until well combined.

In a separate bowl, whisk together the all-purpose flour, salt, cornstarch, and baking soda.

Gradually add the dry ingredients to the wet ingredients, mixing on low speed until almost fully combined. Do not overmix.

Fold in the chocolate chips until evenly distributed throughout the cookie dough.

Prepare the S'mores filling: Place one piece of chocolate on top of each graham cracker square, then top with one large marshmallow.

Take a generous portion of cookie dough and flatten it in your hand. Carefully place one prepared S'mores stack (graham cracker, chocolate, marshmallow) in the center of the dough. Gently wrap the cookie dough around the S'mores stack, ensuring it is completely covered and sealed.

Place the covered S'mores cookies on a baking sheet lined with parchment paper. Refrigerate the cookies for at least 1 hour.

Preheat your oven to 375°F (190°C).

Bake the chilled cookies for 10-12 minutes, or until the edges are golden brown and the centers are set but still slightly soft. The marshmallow inside will be gooey.

Let the cookies cool on the baking sheet for a few minutes before transferring them to a wire rack to cool completely. Serve warm and enjoy the gooey S'mores goodness!
