2 3/4 cups all-purpose flour (see Cook’s Note)

1 1/2 teaspoons baking powder 

1 teaspoon baking soda 

1 teaspoon kosher salt 

2 1/2 sticks (1 1/4 cup) unsalted butter, softened 

1 3/4 cup packed dark brown sugar 

1/4 cup granulated sugar 

2 large eggs, at room temperature 

2 teaspoons pure vanilla extract 

2 cups candy-coated chocolates, such as M&M’s