01 - Line a large baking sheet with parchment paper or silicone baking mat to prevent sticking.
02 - In a large bowl, combine Rice Krispies cereal, mini marshmallows, and pecans if using. Mix well and set aside.
03 - Melt butter in a medium saucepan over medium heat. Add brown sugar, brewed coffee, espresso powder, and salt. Stir constantly until smooth and just beginning to bubble, approximately 2-3 minutes. Remove from heat and stir in vanilla extract.
04 - Pour hot coffee mixture over cereal mixture. Quickly fold with a spatula until evenly coated, working efficiently before mixture begins to set.
05 - Using a cookie scoop or tablespoon, drop mounds onto prepared baking sheet. Press gently with the back of the spoon to flatten slightly if desired.
06 - Melt chocolate chips with coconut oil in a microwave-safe bowl in 20-second intervals, stirring until smooth. Drizzle over shaped cookies using a fork or spoon.
07 - Refrigerate cookies for at least 30 minutes until completely set and firm to the touch.
08 - Store in an airtight container in the refrigerator for up to 1 week for optimal freshness and texture.