Preheat your oven to 350°F (175°C) and grease an 8x8 dish like your life depends on it.
In a large bowl, mash sweet potato until smooth. Stir in coffee, oil, milk, vanilla, and sugar until combined.
In another bowl, whisk together flour, baking powder, soda, cinnamon, nutmeg, and salt like a confident kitchen queen.
Fold dry ingredients into wet ingredients until just combined. Don’t overmix unless you enjoy dense disappointment.
Pour batter into your prepared dish and smooth it like your last awkward text.
In a small bowl, mix topping ingredients. Use your fingers to crumble the vegan butter into the dry mix.
Sprinkle that goodness generously over the batter like fairy dust.
Bake for 40 minutes or until a toothpick comes out clean. Let it cool for 15 minutes—yes, patience is a thing.
Serve warm or cold. No wrong choices here, only delicious ones.