Chocolate Lofthouse Cookies

INGREDIENTS

For the cookies::

6 cups

all purpose flour, divided, plus more for rolling

1 tsp

baking soda

1 tsp

baking powder

3/4 tsp

fine salt

3/4 cup

cocoa powder, unsweetened, plus more for rolling

2 sticks

unsalted butter, at room temperature

2 cups

granulated sugar

large eggs

1 tsp

vanilla extract

1 1/2 cups

sour cream

For the frosting::

2 sticks

unsalted butter, at room temperature

1 tsp

vanilla extract

1 1/4 cups

powdered sugar, or more to taste

3 tbsp

unsweetened cocoa powder

6 tbsp

heavy cream

Sprinkles