Ingredients
Serves: Approximately 24 cookie bars
1 cup (2 sticks) unsalted butter
2-1/4 cup all purpose flour
1 tsp baking soda
1/2 tsp salt
1 cup dark brown sugar
1/2 cup granulated sugar
1 egg plus 1 egg yolk
2 tsp vanilla extract
1 tbsp sour cream
1-1/2 cup semisweet chocolate chips
3/4 cup chocolate-hazelnut spread (such as Nutella)
Maldon flaky sea salt, for garnish
Preparation
