Pre heat your oven to 350. In a large bowl add in your butter and sugars and cream together until light and pale colored.
3/4 cup butter, 1/3 cup brown sugar, 1/2 cup sugar
Mix in your egg, egg yolk and vanilla extract until fully combined.
1 egg, 1 egg yolk, 1 tsp vanilla extract
Add in your flour, salt, espresso powder and baking powder. Mix until just combined.
2 1/4 cup flour, 1 tsp salt, 1 tbsp espresso powder, 1 tsp baking soda
Scoop your cookie dough into small 1.5 inch balls and place on a baking sheet and bake for 12 minutes.
Let the cookies cool on a wire rack and make your Mascarpone topping.
In the bowl of a mixer combine your heavy cream, espresso powder, powdered sugar and vanilla extract. Mix on high until it forms stiff peaks.
1 cup powdered sugar, 1 tsp vanilla extract, 1 cup heavy cream, 1 tsp espresso powder
Fold in your room temperature Mascarpone cheese and then add to a piping bag and pipe onto of your cooled off cookies.
7 oz Mascarpone cheese
Lastly top with some cocoa powder and enjoy!
3 tbsp cocoa powder