This is what me and my dad make in the morning:
1 tbsp coconut oil, 1 tbsp unsalted butter, 2 TSP cocoa powder, 1 1/2 TSP coffee powder and hot water blended up.
What you describe is one of multiple variants of BPC, Bullet Proof Coffee. See this.
PS: this last has succeeding posts that may be of interest to you and your dad.
Here’s one happy camper!