For the cupcakes
1/2 cup plus 3 1/2 tablespoons (101 grams) all-purpose flour
1/4 cup plus 2 tablespoons (31 grams) Dutch process cocoa powder
1/2 teaspoon baking soda
1/8 teaspoon baking powder
1/2 teaspoon salt
1 large egg
1/2 cup plus 2 tablespoons (126 grams) sugar
1/2 teaspoon vanilla extract
2 teaspoons coffee extract
1/4 cup plus 2 1/2 tablespoons (86 grams) mayonnaise
1/4 cup plus 3 tablespoons (105 grams) water, at room temperature
For the frosting
16 tablespoons (2 sticks, 226 grams) unsalted butter, at room temperature
2 cups powdered sugar
1 teaspoon vanilla extract
2-3 teaspoons coffee extract
pinch of salt
mini chocolate chips for topping
For the cupcakes
Preheat the oven to 325 degrees fahrenheit and line a cupcake pan with paper linersIn a medium bowl, sift together the flour, cocoa, baking soda, baking powder, and salt.
Add the salt and whisk together.In the bowl of a stand mixer fitted with the whisk attachment, combine the eggs, sugar, vanilla extract, and coffee extract on medium low speed for about 1 minute.
Turn up to medium, and continue beating for about 5 minutes, until the mixture has become pale and thick.Scrape down the sides of the bowl, and continue beating on medium high for another 5 minutes. The mixture should have thickened by this point.
And the mayonnaise and whisk until combined.
Remove the bowl from the stand mixer. Using a spatula, fold in the flour mixture and the water in 2 additions each.
Use a cookie scoop to evenly divide the batter between the paper liners.Bake for 12-15 minutes, or until a toothpick inserted into the center comes out clean.Cool completely before frosting.
For the frostingIn the bowl of a stand mixer, beat the butter on medium until light and fluffy (about 3 minutes).
Add the powdered sugar and beat on low, until just combined. Turn the mixer up to medium and beat for an additional 2-3 minutes.
Add the vanilla extract, coffee extract, and salt. Mix until combined.
Fill a decorating bag with the frosting and pipe onto the cupcakes in swirls.
Top with mini chocolate chips.