Preheat oven to 400°F (200°C) and line a baking sheet with parchment paper.
Toss cubed sweet potatoes with olive oil, salt, pepper, and smoked paprika.
Spread potatoes evenly on the baking sheet, making sure they aren’t crowded.
Roast for 25-30 minutes, flipping halfway through for even browning.
While potatoes roast, whisk coffee, maple syrup, balsamic vinegar, mustard, cinnamon, and cayenne in a small bowl.
Let roasted potatoes cool for 2 minutes, then drizzle with the coffee mixture.
Toss gently to coat, or let people drizzle their own like civilized humans.
Serve immediately, preferably with a smug sense of culinary superiority.