In a pan on the stove over medium heat, melt the butter/margarine and coconut oil. Whisk in the cocoa powder to ensure all clumps are worked out.
Add the brown sugar and corn syrup to the fats. Stir until just combined and bring to a bubble.
Once bubbling, turn off the heat and add the baking soda and whisk in. Then add the peanut butter and whisk in.
In a large bowl, combine the popped popcorn (with the unpopped kernels discared - very important) and the corn Chex. Pour the caramel over top and stir to gently to combine and coat evenly. Add the nuts, chocolate chips, and sea salt. Toss together to combine.
Pour out onto the counter on top of a layer of butcher paper and try not to eat it all immediately so it can cool off. But if you do eat it all immediately, who's gonna know, really?