Cannoli Cupcakes

INGREDIENTS

6 tbsp

unsalted butter (at room temperature)

1/2 cup

sugar

1/4 cup

light brown sugar (loosely packed)

6 tbsp

sour cream (at room temperature)

1 1/2 tsp

pure vanilla extract

large egg whites (at room temperature, divided)

1 1/4 cups

all purpose flour

2 tsp

baking powder

1/4 tsp

ground cinnamon

1/4 tsp

salt

6 tbsp

milk (at room temperature)

2 tbsp

water (at room temperature)

2 cups

mascarpone cheese (at room temperature)

2 cups

confectioners' sugar (plus more for dusting cupcakes)

1 tsp

vanilla extract

mini chocolate chips