Quadruple Chocolate Soft Fudgy Pudding Cookies

unsalted butter, softened (1 1/2 sticks)

light brown sugar, packed

granulated sugar

large eggs

vanilla extract

packet instant chocolate pudding mix, about 3.7 to 3.9 ounces (not sugar-free and not ‘cook & serve’)

unsweetened natural cocoa powder

all-purpose flour

baking soda

salt, optional and to taste

semi-sweet chocolate chips

dark chocolate, chopped (I used Trader Joe’s 72% Pound Plus Bar)