In the bowl of a stand mixer, cream together the butter and sugars until light and creamy.
Beat in the egg, sour cream, and vanilla until evenly incorporated.
In a separate bowl, add the dry ingredients. Use a fork to stir them together until they're evenly incorporated.
Alternating between the two, mix the dry ingredients and the coffees into the muffin batter. Beat just until the batter has evenly come together.
Use a spatula to fold in 3/4 cup of the mini chocolate chips.
Spoon the batter evenly into sixteen lined cupcake pans. Sprinkle the tops with the remaining chocolate chips.
Bake the cupcakes at 400 degrees for 16-18 minutes.
Remove the cupcakes from the oven. and let them rest for 5 minutes. Remove them to a wire rack to finish cooling completely before serving.