01 - Line a large baking sheet with parchment paper or silicone baking mat and set aside.
02 - In a large mixing bowl, combine Rice Krispies cereal, mini marshmallows, and toasted pecans. Mix gently and set aside.
03 - Place a medium saucepan over medium heat. Melt butter, then add brown sugar, brewed coffee, espresso powder, and sea salt. Stir constantly until mixture is smooth and begins to bubble, approximately 2-3 minutes. Remove from heat immediately.
04 - Stir vanilla extract into the hot coffee mixture until fully incorporated.
05 - Pour the hot coffee mixture over the dry ingredients. Using a spatula, fold quickly until all cereal and marshmallows are evenly coated.
06 - Using a cookie scoop or tablespoon, drop mounds onto the prepared baking sheet. Press gently with the back of the spoon to flatten slightly into cookie shapes.
07 - Place chocolate chips and coconut oil in a microwave-safe bowl. Heat in 20-second intervals, stirring between each, until smooth and melted. Drizzle over cookies using a spoon or piping bag.
08 - Transfer baking sheet to refrigerator. Chill for at least 30 minutes or until cookies are firm and set.
09 - Store cookies in an airtight container in the refrigerator for up to 1 week for best texture and freshness.