In a medium mixing bowl, combine graham cracker crumbs, rolled oats, and a pinch of salt. Stir until well mixed.
In a microwave-safe bowl, add dark chocolate chips and peanut butter. Heat in the microwave in 20-second intervals, stirring in between, until melted and smooth.
Pour the melted chocolate mixture into the dry ingredients and add honey (or maple syrup) and vanilla extract. Mix until fully combined.
Gently fold in the mini marshmallows, ensuring they're evenly distributed throughout the mixture.
Line a baking sheet with parchment paper. Using a cookie scoop or your hands, form small balls (about 1-2 inches in diameter) and place them on the prepared baking sheet.
Flatten each ball slightly to shape them into cookie rounds.
Refrigerate for at least 30 minutes to let the cookies set.
Notes
Serve on a rustic wooden board with melted chocolate drizzle and crushed graham crackers.