Frosted Chocolate Sugar Cookies

INGREDIENTS

1 cup

unsalted butter, room temperature

1 cup

brown sugar

1/2 cup

granulated sugar

2 tsp

pure vanilla extract

large eggs (extra large eggs preferred)

2 cups

all-purpose flour

1 tsp

baking soda

2 tsp

cornstarch

1 cup

cocoa powder (I used dark cocoa powder)

extra granulated sugar for flattening the cookies (1/4 cup)

4 tbsp

unsalted butter, room temperature

4 tbsp

coconut oil, room temperature (can use all butter, if desired)

3 cups

powdered sugar, sifted

2/3 cup

cocoa powder (I used dark cocoa powder), sifted

1/4 tsp

salt

2 tsp

vanilla

1/3 cup

milk (+ additional teaspoons until desired consistency)