Nutella Stuffed Chocolate Chocolate Chip Cookies

INGREDIENTS

2 1/4 cups

all-purpose flour

1/2 cup

cocoa powder*

1 tsp

baking powder

1/2 tsp

baking soda

1/2 tsp

salt

1 cup

butter (, softened (I used salted))

3/4 cup

granulated sugar

3/4 cup

packed light-brown sugar

large eggs

2 tsp

vanilla extract

1 cup

semi-sweet chocolate chips**

1 cup

milk chocolate chips ((or an additional 1 cup semi-sweet))

jar of Nutella

sea salt for sprinkling tops (, if desired)