Combine the popping corn with the canola oil in a deep pot.
Pop the popping corn over medium-high heat, stirring the pot frequently, until all of the kernels are popped.
Let the popcorn cool completely out of the pot and then grind it in a Robot Coupe as finely as possible. Pass the popcorn through a fine-mesh sieve.
Combine the popcorn with the freeze-dried butter powder.
Gently stir in the melted anhydrous butter. Add alittle at a time; you may not need all of the butter. There should be just enough so that the popcorn is still loose but holds together when compressed.