Soft and Chewy Nutella White Chocolate Chip Cookies

INGREDIENTS

1/2

cup unsalted butter, softened (1 stick)

heaping 1/3 cup Nutella (stir well before adding)

1/2

cup light brown sugar, packed

1/4 cup

granulated sugar

large egg

2 tsp

vanilla extract

1 3/4 cups

all-purpose flour

2 tsp

cornstarch

1 tsp

baking soda

salt, optional and to taste

cup white chocolate chips

cup semi-sweet chocolate chips