Line a large, rimmed baking sheet with parchment paper.
Combine the Crispix, almonds, and pretzels in a large, microwave-safe mixing bowl. Mix thoroughly. Melt the butter in a small microwave-safe dish; add brown sugar and cardamom. Mix well. Add to the Crispix mixture and stir until well coated.
Microwave the Crispix mixture for 45 seconds. Remove and stir well, being sure to stir any pieces stuck to the bottom of the bowl. Return to microwave and cook on high for another 45 seconds. Remove and stir again.
Spread mixture on the parchment lined baking sheet and let cool for at least 5 minutes. Once cool sprinkle the M&Ms into the mixture.
Place the chocolate chips in a microwave-safe bowl. Microwave for 20 seconds at a time, stirring between, until a smooth mixture is formed about 1 minute and 20 seconds. After the last 20 seconds stir in the coconut oil to make the mixture easier to drizzle on the snack mix.
Using a small spoon, drizzle the mixture onto the snack mix in whatever pattern you prefer. If you are planning to portion out to individual servings you can reserve about a quarter of the chocolate to drizzle on at the end. Let the mixture cool for 20-30 minutes. Serve or place in an air-tight container until ready to serve.
You can serve this snack mix directly from the baking sheet, pour it into a large serving bowl or portion out into individual servings.