Tiramisu Sandwich Cookies

INGREDIENTS

1 1/2 cups

all-purpose flour

1/4 cup

unsweetened cocoa powder

1/2 tsp

baking powder

1/4 tsp

baking soda

1/4 tsp

salt

1/3 cup

milk

1 tbsp

instant espresso powder

1/2 tsp

pure vanilla extract

6 tbsp

unsalted butter, at room temperature

3/4 cup

granulated sugar

large egg

6 oz

mascarpone cheese, at room temperature

4 oz

cream cheese, at room temperature

1/3 cup

confectioners' sugar, sifted, plus more for dusting

1/2 tsp

pure vanilla extract

1 tbsp

coffee liqueur, such as Kahlua

1 tsp

instant espresso powder