Homemade "Milano" Cookies - Chocolate Orange Thins

INGREDIENTS

1 stick

plus 2 tablespoons (5 oz, 140 g) unsalted butter, room temperature

1 1/2 cups

(6 oz, 170 g) confectioner's sugar

grated zest of 1 orange, divided in half

1 tbsp

orange juice

1/2 tsp

real orange extract

1 tsp

vanilla extract

large egg, room temperature

1/4 tsp

table salt

1/4 tsp

baking soda

1 cup

(5 oz, 140g) all purpose flour

8 oz

semi-sweet chocolate, chopped