01 - Line a baking sheet with parchment paper or a silicone mat and set aside.
02 - In a heatproof bowl, combine the chopped dark chocolate and coconut oil. Melt together using a microwave in 30-second bursts, stirring between each interval, or over a double boiler until completely smooth and glossy.
03 - Fold the chopped almonds, toasted coconut, and crisp rice cereal into the melted chocolate. Stir until every piece is thoroughly coated and the mixture is evenly combined.
04 - Drop heaping tablespoons of the mixture onto the prepared baking sheet, spacing them about 1 inch apart to allow for even setting.
05 - If desired, sprinkle each cluster with a pinch of flaky sea salt while the chocolate is still warm and unset.
06 - Refrigerate the clusters for at least 30 minutes, or until they are firm to the touch and fully set.
07 - Transfer the set clusters to an airtight container and store in the refrigerator for up to 2 weeks.