1. Preheat oven to 350 F. Add cupcake liners to a pan and set aside.
2. Melt the butter and allow to slightly cool.
3. In a large bowl, whisk together melted butter, oil, coffee, egg, buttermilk, and vanilla.
4. In a separate bowl, combine dry ingredients: flour, sugar, cocoa, baking soda, and salt.
5. Add the flour mixture to the wet ingredients and mix together until the batter is fully combined and smooth, making sure to scrape the sides and bottom of the bowl occasionally.
6. Using a 1-tbsp cookie scoop, scoop 3 tbsp of mixture into each cupcake liner. Bake for 22 minutes or until a toothpick inserted into the center of a cupcake comes out clean.
7. Transfer to a cooling rack and allow to come to room temperature before frosting.