Preheat the oven to 400°F (200°C) and line a baking sheet with parchment paper.
Wash and dry the sweet potatoes, then poke holes all over with a fork.
Rub them with olive oil and sprinkle with salt.
Bake for 40–45 minutes until soft and caramelized.
While baking, combine coffee, maple syrup, butter, cinnamon, and sea salt in a saucepan.
Simmer on low for 5 minutes, stirring until thickened.
Slice the baked potatoes open and drizzle generously with the warm coffee glaze.
Serve immediately, resisting the urge to drink the glaze straight from the pan.