Preheat the oven to 350°F / 175°C. Line a muffin tin with 6 parchment liners.
Add the cocoa powder to a medium sized mixing bowl. Brew 60g (2 oz.) of espresso or strong coffee, then immediately pour it over the cocoa powder. Mix well until the mixture is lump-free.
Add in the vegetable oil, sugar, egg, and sour cream. Whisk the mixture together until it's well combined.
Add in the flour, baking powder, and salt. Gently fold the dry ingredients into the wet ingredients just until the last streak of flour disappears into the batter.
Distribute the cupcake batter evenly between the 6 liners. Bake for 15-20 minutes, or until a toothpick inserted in the center of the cupcakes comes out clean
Raspberry Cream Cheese Frosting
In a large mixing bowl, with a hand mixer (or stand mixer fitted with the paddle attachment) beat together the cream cheese, butter, and salt until the mixture is light and fluffy.
Add in the crushed freeze dried raspberries and half of the powdered sugar and beat until combined. Then, beat in the rest of the powdered sugar.
Beat the frosting for an additional minute, until light and fluffy.
Once the cupcakes have cooled, transfer the buttercream to a piping bag fitted with your tip of choice. Frost the cupcakes, then garnish with a chocolate heart and a halved recipe. Enjoy!