Salted Caramel Chocolate Chip Cookies

and 1/4 cup (280g) all-purpose flour (spoon & leveled)

baking soda

and 1/2 teaspoons cornstarch

salt

or 170g) unsalted butter, melted

light brown sugar, loosely packed

granulated sugar

large egg + 1 egg yolk*

vanilla extract

chocolate chips, divided

Rolo candies (or other chocolate coated caramel)

sea salt for sprinkling